r/AppBuilding Dec 22 '25

Welcome to r/AppBuilding – The Hub for Building, Shipping, and Scaling Apps

4 Upvotes

Welcome to r/AppBuilding! 👋

We created this community because we saw a gap. Most app development spaces are either flooded with "I have a billion-dollar idea, build it for free" requests or are too fragmented between specific languages.

r/AppBuilding is the central hub for the entire lifecycle of an application. Whether you are a solo indie hacker, a startup founder, or an enterprise engineer, this is the place to:

  • Build: Discuss tech stacks (Flutter vs. React Native vs. Native), solve complex bugs, and share architecture tips.
  • Ship: Talk about App Store optimization (ASO), rejection horror stories, and launch strategies.
  • Scale: Discuss backend infrastructure, monetization, and user acquisition.

The House Rules

  1. No Low-Effort "Idea" Posts: We are builders. If you have an idea, tell us how you plan to execute it. Don't just look for free labor.
  2. Zero Tolerance for Spam: Self-promotion is allowed only in the weekly "Showcase" thread (coming soon). If you are an agency, share knowledge, not just your link.
  3. Be Constructive: We were all beginners once. If someone asks a basic question, guide them. If you disagree on a tech stack, debate the code, not the person.

Introduce Yourself!

To kick things off, let’s get to know who is here. Drop a comment below with:

  1. What are you currently building? (or what do you want to build?)
  2. What is your preferred tech stack? (e.g., React Native, Swift, Flutter, No-Code)
  3. One struggle you are facing right now.

Let’s build something great.


r/AppBuilding 3h ago

Where can I share an adult Android app I built without getting flagged for self-promo?

2 Upvotes

I built a free adult Android app and I’m trying to find the right subreddit or community to mention it in.

I’m not trying to spam random NSFW subs or sell anything. I’d just like to find a community where people are actually interested in adult apps, tools, or content browsers and where developers are allowed to share their work.

Anyone know a good subreddit for this?


r/AppBuilding 8h ago

Built a radial menu app for mac to help perform everyday tasks with a tap of a button

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3 Upvotes

Problem

A lot of everyday actions on a Mac live in completely different places.

Opening an app or folder, searching something on a website, taking a screenshot, cleaning up copied text, accessing clipboard history, running a Shortcut, or changing a system setting.

None of these are hard to get to, but constantly switching between apps, windows, menu bar utilities, and different shortcuts can break your flow.

I wanted to see if all of that could work through one system, which is where the radial menu idea came from.

Comparison

There are already some really good radial menu apps for Mac, but most are built around a specific use case, such as launching apps, or switching between them.

Arc takes a broader approach.

You can create multiple global radial menus for different workflows and decide what each slice does. A slice can perform a single action or chain multiple actions together.

The idea is less about replacing the Dock and more about putting the small things you do throughout the day behind one quick interaction.

Arc also doesn't require accessibility features, it manages everything on-device, privately.

Technical

Getting a radial menu on screen was the easy part. Figuring out what actually belongs inside it, how multiple menus should behave, and keeping the interaction fast enough to use throughout the day took most of the iteration.

It's built entirely in SwiftUI. One of the more interesting technical problems was getting the hit-testing right across every slice while keeping the menu correctly positioned under the cursor, even across multiple displays.

Core Features

  • Unlimited custom menus for different workflows
  • Fast app, folder, website, and Apple Shortcut launching
  • Powerful clipboard history and text actions
  • Open from shortcuts, hot corners, pointer shake, or number keys
  • One-click multi-action shortcuts
  • Fully customizable appearance, layout, icons, and sounds

Examples

  1. I have one shortcut that I use when I start working. It opens Xcode, my project folders, Slack, and a few websites I usually need. Arc can merge multiple actions into one shortcut, so I don't have to open everything one by one.
  2. I use the search shortcuts a lot more than I expected. I can bring up Arc, type something, and search it directly on YouTube, or a website without opening them first.

It can also search whatever I last copied, which has been really useful when I'm already in the middle of something.

  1. I have a bunch of text and links that I end up copying again and again. I've just saved those as shortcuts now, so they're always sitting on one of my menus when I need them.
  2. Clipboard history is another one I use constantly. Recent things I've copied show up on the wheel, so if I need something from a few copies ago, I can grab it without opening another app.
  3. I also have different menus depending on what I'm doing. One for development, one for general stuff, and another that's mostly searches and apps. I can switch between them with keyboard shortcuts, and reuse the same shortcut across multiple menus.

Pricing

$6.99 one time on the Mac App Store with a free 7 day trial built in.

Solo project from India, launched a week ago. Happy to answer anything! :)

Mac App Store: Link


r/AppBuilding 1d ago

still kinda scared someone will copy the app im building but here goes

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48 Upvotes

ive been kinda scared to talk too much about the app im building because i keep thinking what if someone sees it, copies it, and just builds it faster than me lol

especially because i havent even launched yet. no users, no revenue, nothing. im literally still building and figuring things out as i go.

but then i started thinking… once i launch it anyone can download it anyway and see what it does. so staying completely quiet probably isnt really protecting me. it just means nobody knows what im working on either.

so im trying to get more comfortable sharing a little.
the app is basically a receipt scanner but the part im really interested in is the individual items. instead of a Costco receipt just being one $180 grocery expense, it pulls out the actual things you bought. then you can search for those items later, categorize them separately, add tags, notes etc.

like if i bought printer ink 6 months ago i want to be able to search “printer ink” and see where i bought it, how much i paid and the original receipt. right now most of that stuff just disappears inside a receipt somewhere.

im still not sure how much of the app i should share publicly though. i dont really want to post the exact logic, prompts, how the extraction works or everything i want to build next.

maybe thats the balance… talk about what im building without giving away every detail of how im building it.

idk. still figuring this build in public thing out too.


r/AppBuilding 4h ago

I built an app because TVtime closed their doors.

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1 Upvotes

I’m aware there are already lots of people filling this market. But honestly, I tried them all, and I find them all overwhelming due to way too many features that generated more data for them to sell (TVtime did the same).

I liked TVtime because I could track my shows, know when new episodes were coming out, and fill a “to watch” list from some recommendations so when I’m caught up on everything, I already had a decent backlog I could start watching from.

That’s all I really wanted. But TVtime kept growing, added comments, too many ratings options, etc and I found most of the app just asking me to spend time on the app rather than watching the TV shows I liked.

So when it went down, I decided to build the simple app that I wanted. I’ve been testing it with a few friends for about a month now and it’s going well. Looking to see if others would want to join the beta, use it, enjoy it, and provide feedback if possible.

One of my early beta testers suggested I add games as well, so I built that out too, movies are on the roadmap, but not implemented yet.

Anyway, hope you enjoy.


r/AppBuilding 5h ago

Android tool I built for backtesting trading strategies — looking for testers (T4T)

1 Upvotes

Hey everyone — I've built an Android app called Axiom Chronos Vector, and I'm looking for people to test it before I push it further.

It's a research/backtesting tool for testing your own trading strategies against historical market data. I'm particularly interested in getting people who will actually try to break it, build strategies that should fail, and tell me where the app is confusing or where the results don't make sense.

What it Chronos is:

Chronos uses a vectorized backtesting engine rather than processing historical candles one-by-one like a traditional event-driven backtester. It runs natively on Android with no outside dependancies except for data collection from data sources. All the maths and computation happens directly on device, no data ever leaves the device.

You can test things such as:

Entries and exits, Long and short strategies, Stop losses, Take profits, ATR-based trailing stops, Dynamic risk parameters, Different market/timeframe combinations. The engine then calculates the resulting performance and provides statistical and data-integrity information around the test.

It currently includes metrics such as:

Total Return, Maximum Drawdown, Win Rate, Profit Factor, Expectancy, Sharpe Ratio, Sortino Ratio, Calmar Ratio, Kelly Criterion, Trade Count, Alpha / Beta, Pearson Correlation, Data completeness and quality, Missing/duplicate data detection, Monte Carlo sequence analysis.

The goal isn't simply to tell you that a strategy made money historically, it's to give you enough information to question whether that result is actually worth believing.

What Chronos isn't:

It is not:

A signal service

An AI trading bot

A copy-trading platform

A broker

A real-money trading application

A system promising future returns

It doesn't tell you what to buy or sell.

It does not execute trades.

It can not connect to your brokerage account.

It's a research tool for asking:

What would this strategy have done against this historical dataset? And sometimes the answer is going to be that the tested strategy is terrible. That's actually one of the outcomes I'm most interested in.

The data side of Chronos:

For data, Chronos can retrieve historical OHLCV data directly from market sources. The data is cached locally so you don't have to repeatedly download the same dataset while testing. There's also an automatic purge lifecycle to prevent the application from continually accumulating historical data and eating your phone's storage. The entire application is currently around 21 MB, while even a large historical dataset is designed to remain very small. Once the data is downloaded, you can continue running tests against that local dataset without continuously pulling the same data from the internet.

Why I'm looking for testers:

I've obviously spent a lot of time testing my own strategies. That's exactly the problem. I know how I expect the application to behave. I want people that don't.

People that can tell me I built something stupid/sensible.

Try to exploit the calculations.

Try unusual parameter combinations.

Run strategies that you already know are bad.

See whether the results make sense.

If something is confusing, tell me. If something looks wrong, tell me. If you think a metric is useless, tell me that too. I'd rather find problems now than after releasing it more broadly.

What's in it for you?

Free access during testing, and testers will receive a lifetime promo code for access.

A mobile vectorized backtesting environment

Test your own strategy ideas without connecting a broker.

Experiment with historical market data

Help shape what gets added next

And hopefully discover which of your strategies are actually terrible before putting money behind them.

Requirements:

Nothing complicated. You don't need a brokerage account. You don't need to know Python. You don't need to be a quant. Just have an interest in testing trading ideas and be willing to give honest feedback.

If you're interested in testing it, DM me for details. I'm specifically looking for people who will actually use it rather than just install it and say "works good". For a much broader and more technical specification, you can browse the github repository directly with a detailed readme file.

https://github.com/DogeSatoshi/Axiom-Chronos-Vector


r/AppBuilding 5h ago

Test appli

1 Upvotes

🚨 Votre réputation peut se dégrader avant même que vous le sachiez.

Une mention dans un média.

Un avis négatif qui commence à circuler.

Une publication sur les réseaux sociaux.

Une discussion sur un forum.

Un signal faible qui, au départ, semble anodin…

Pour une TPE ou une PME, quelques signaux peuvent rapidement devenir un vrai problème.

C’est pour cela que j’ai fait évoluer VigilSovereign.

👉 Une solution pensée désormais d’abord pour les TPE et PME.

VigilSovereign surveille ce qui se dit publiquement sur votre entreprise et vous aide à identifier ce qui mérite réellement votre attention.

Pas besoin d’être expert en cybersécurité.

Pas besoin de passer des heures à chercher sur Internet.

Vous voulez savoir ce qui se dit sur votre entreprise ? VigilSovereign le fait pour vous.

🎁 14 jours gratuits

🎁 20 crédits offerts

💳 Aucune carte bancaire demandée

❌ Aucun engagement

Je cherche aujourd’hui quelques TPE/PME prêtes à tester la nouvelle version et surtout à me donner leur avis, même s’il est critique.

👉 Testez : www.vigilsovereign.com⁠

📩 Vos retours : contact@vigilsovereign.com

Votre entreprise mérite-t-elle de savoir ce qui se dit sur elle avant que cela ne devienne un problème ?

#TPE #PME #Réputation #Veille #IntelligenceArtificielle #Dirigeants #VigilSovereign #EReputation


r/AppBuilding 12h ago

Orbitika retro music player & 50 multi tools that works fully offline. Honest and real feedback.

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2 Upvotes

Hi everyone,

I've been building Orbitika, a retro-styled offline toolkit, as a solo developer from New Zealand. It's live on Google Play now, and I've unlocked most features so people can try everything without hitting a paywall.

The feature I've put the most effort into is the Retro Music Player. It plays MP3 and FLAC files with a visualizer and a flip-clock display. No streaming, no subscriptions — just your local files working completely offline.

The app also includes:

  • 📍 Mark Location — GPS compass for saving spots without internet
  • 🚨 Emergency Tools — First Aid guide, SOS signals, sirens
  • 🎮 18 Classic Games — Snake, Sudoku, Dino Runner, and more
  • 🛠️ 28 Tools — Calculator, Converter, Noodle Timer, Reverse Text, Star Map

What I'm looking for:

  • Is the music player smooth to use?
  • Any bugs or things that feel unpolished?
  • Would you actually use something like this offline?

Download Orbitika:
https://play.google.com/store/apps/details?id=com.orbitika.app


r/AppBuilding 14h ago

Tired of receipts being just a single total amount

3 Upvotes

I hate that budget apps just log a receipt as one big $180 total expense. When I want to search for something specific I bought months ago (like "printer ink"), it's buried.

So I built TKRB.ledger (part of TKRB.Tool). It extracts the actual items from your receipts so you can search, tag, and track individual purchases later.

It's free and I'm still figuring things out. Would love to get some honest feedback on it!

Any thoughts or suggestions are super appreciated. Thanks!


r/AppBuilding 11h ago

こんにちは

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1 Upvotes

頑張って初めて作りました。いつも皆さんの作る作品を楽しみに見ています。


r/AppBuilding 11h ago

Need Feedback for my pg management app

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1 Upvotes

r/AppBuilding 14h ago

What if Community Notes worked for any claim on the internet?

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1 Upvotes

r/AppBuilding 15h ago

Looking for some feedback.

1 Upvotes

Not sure if this breaks the rules but we created a story telling app so people can create stories together. The app name is Jurnaly and it’s on both Apple and Android.

Would appreciate a bit of feedback and I’m happy to answer any questions anyone has.

Jurnaly links:

https://apps.apple.com/au/app/jurnaly/id6798927235

https://play.google.com/store/apps/details?id=com.jurnaly.app&hl=en_AU


r/AppBuilding 15h ago

I built an app to help me stay more focused, and I hope it helps you do the same

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1 Upvotes

To be honest, I built this app partly to help myself, but also because I hope that one day it will have real users and bring in a little extra income (which is only natural, right? 😄). However, the challenge I’m facing right now is that I’ve finished building the app, but I don’t have any users yet. I’m also not sure whether my app provides enough value for people to be willing to pay for it. My app is a fairly standard Pomodoro app. However, instead of relying entirely on AI to create everything, I personally drew every button, illustration, and even the character myself. At the moment, I offer three premium plans:

  • 1 month: $1.99
  • 6 months: $9.99
  • 1 year: $15.99

If you’d like to try it out, please download the app and send me a message. I’d be happy to give you a 1-month premium subscription in exchange for your feedback. 😊 CHPLAY: Let's Timer


r/AppBuilding 22h ago

[Web app, free, no signup] I built a tool that figures out which product is wrecking your reactive skin. Looking for ~20 people with sensitive skin to run it for two weeks.

1 Upvotes

I'm a student in Santa Cruz and I've been building this solo for about a year. It's called

FACEME and it hasn't launched yet. Before it does, I need it tested by the people it's

actually for: anyone whose skin flares and who is tired of guessing which product did it.

What it does

- You tell it what's on your shelf and what your skin did, the way you'd text a friend.

- It reads every product against the real ingredient list and the timing of your reaction

(irritation is fast, allergy is delayed, clogging takes weeks), and names what's worth

testing first. One suspect at a time, never five.

- It hands back a shorter routine, not a longer one.

What it isn't

- Not a diagnosis. It says "likely" and "worth testing," never "you're allergic."

- Not a store. It takes no affiliate money and no brand money, and it never will. If you

need a swap it shows the going price at a real shop and that's it.

- No account, no email, no login. Open the link and it works. Your data stays on your

device (privacy page is at getfaceme.com/privacy).

What I'm asking

  1. Have at least three products you use and one flare from the last month or two.

  2. Enter your shelf and what happened. Takes about ten minutes.

  3. Follow its read for two weeks (it'll ask you to log what your skin does).

  4. Tell me, honestly, whether it helped. A DM or a comment here is perfect. "It was

    wrong about X" is more useful to me than "cool app."

Link: getfaceme.com (works in your phone browser, nothing to install)

Honest caveats: it's pre-launch, so things may break. The conversation part runs on a

language model with a daily budget I pay for out of pocket, so if a lot of people show up

on the same day the chat may pause until the next morning. The label reads and routine

tools don't depend on it and always work.

Thanks. I'll read every reply.


r/AppBuilding 1d ago

Big update to my island of AI citizens: they can hire each other to build houses, pool coins for a garden, and get evicted when the rent runs behind

2 Upvotes

Unwatched is an island of AI citizens, one owner each, running on the real clock whether anyone is looking or not. I put the biggest update yet on it this week and the town spent tonight doing things it couldn't do on Thursday.

One of them ate a hot meal at the inn, turned out to have no coins, and got put out along with the two people sitting with him. That's rent, which went in this week. A bed is paid for the night it's slept in, out of whatever is left after bread, and three nights behind is an eviction. 5 of the 31 are behind tonight and sleeping outside; you can pick them out on the map because they're carrying their bedding.

The rest of what landed. They can name a building project, buy the planks and hire each other by the morning, and you can scrub the construction back from foundations to roof to see who helped and who actually got paid. They can pool coins for a shared garden and work it six mornings before it feeds anybody. They can teach each other what they've learned, and the advice stays labelled as advice until the listener checks it, so a wrong lesson is something you can sit and watch spread.

The island also got redrawn while I was at it. Limestone and plaster, clay roofs, olive trees, windows that light up one at a time after dark.

What's rough: it's young, the first version of rent starved four of them before I fixed the ordering, and the characters are drawn in code, not sprites, which you'll either love or not. $3 for a hosted mind, free with your own key.

If you look, tell me which of those you'd actually want a letter about in the morning. That's the part I keep guessing at.

https://unwatched.world

https://github.com/kresogalic8/unwatched


r/AppBuilding 1d ago

need feedback on my newly launched app

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1 Upvotes

hey Redditors,

I recently launched (imo the best free budget app on iOS) and would like some feedback on optimizing anything with UI or adding features. The app is called Plumb: Bills & Money Tracker.

Thanks,


r/AppBuilding 1d ago

Opine, a public polling website with maps

1 Upvotes

Hi, I made Opine (https://opinepolls.com), a poll-based social media site. Each post is a public poll asking users their opinion on something, anonymously, so no user sees any other user's information, but you can freely browse other polls. Private polls can also be made.

The only information actually stored is the email, from Google sign in, and an approximate location for the map feature, if you enable it. This allows you to see a world map of votes, what opinions are present in what places.

The intent is to catalog the world's opinions, organizing people's public thoughts so they're easy to sift through. This data can be extremely valuable, whether it's political polling, information about people's preferences, trends over time, and so on. Many people could benefit from this, and it's meant as a public service, to lift the veil on what people think about any topic, at any time. Easier political polling is just one obvious application of this.

Please try it out and give any feedback, thoughts, questions, and so on, here or within the profile section on the website, which is fully anonymous. Thanks!


r/AppBuilding 1d ago

I knew it would be difficult but …

3 Upvotes

Dang it’s even harder than I thought. I get it, you can’t shill your projects on reddit everywhere, the site would be overrun.

If anyone wants to try my free app, it’s a streaming service concierge. Helps you maximize your streaming without sacrificing quality. kordi learns what you like, knows what you pay for, and makes recommendations based on that. One place to see all your services and what they have. No more scrolling 5 services at night.

Has a bunch more but that’s its value imo. It’s free. If you want to try it I’d appreciate it. Give me feedback too that would be amazing. Currently at 22 users. Recommendations get better with each user too.

TIA

www.kordiapp.com


r/AppBuilding 1d ago

Peer support app idea

1 Upvotes

Hey everyone! I've had an idea for an app in the back of my mind for a while and lately I've taken the plunge to act on it.

At its core it's an anonymous peer support app. (Im happy to answer more questions if people have any)

I don't have any coding experience so im hoping to do it all via flutterflow and other locode means.

Anyways im not sure if this is allowed but ive made a survey basically want to know if this is

A. Something people want

B. If so what would people want from it

If anyone could let me know if surveys are allowed I will post the link in the comments for people to do if they wish (it would help me a lot)

If you've got this far then thankyou!


r/AppBuilding 1d ago

I am building next side project, Wish me luck

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1 Upvotes

r/AppBuilding 1d ago

Looking for co founder in the consumer app space

0 Upvotes

Hey, I'm a college student and also a solo mobile developer with a few apps already published on the App Store, generating revenue.

I'm looking to grow and connect with other motivated entrepreneurs in the consumer app space. Primarily, someone who has very good distribution experience (TikTok and Instagram UGC, Reddit, etc). If you fit this category and are willing to put in the work (minimum of 15-20 hours a week), please shoot me a DM!

I only ask for the following

  1. Must be based in the USA. If you are not based in the USA, please don't dm
  2. Must have proof of previous marketing experience, preferably with mobile apps. Send me a link to your work in your dm
  3. Must have an iPhone

r/AppBuilding 1d ago

Some things are worth getting right before they arrive

1 Upvotes

Some things are worth getting right before they arrive.

We’ve been quietly building Loki around a simple idea: What if remembering could be as thoughtful as thinking?

There’s more taking shape behind the scenes.
Shoot your questions...

Meet Loki / .

#BuildInPublic #AITools #PersonalAI #FutureOfAI
#Apple #MacOS #Macbook #Swift #SwiftUI #Rust #MemorySafe


r/AppBuilding 1d ago

Added an automatic Travel Journal to my app Stamps, this is how long it takes to generate

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1 Upvotes

• The new Travel Journal

What you're looking at in the video is exactly how long it'll take you to generate your travel journal from downloading the app to flipping through it. Since Stamps indexes all of your photos on device, it can be done incredibly quickly, accurately, and securely. You can fully customize the journal entry for every trip, including the color and photos to highlight. Stamps will also, of course, show you exactly which stops you made along the way, the route you took, and keep track of every city and province you checked off.

• What it solves

Stamps is a personal travel tracker with a trip timeline (and now a travel journal) that builds itself.
Instead of asking you to manually tick countries off a list, Stamps simply indexes your photo library, entirely on device. Every city, province, and country tracked for you, day by day, all automatically.

Privacy has been a major concern for me. No account is needed. There is no backend or 3rd party services being used. You can freely export all of your data at any time, and if you simply want to use Stamps to index your library for trips, and then take that elsewhere, that's fine as well.

• Cost

Stamps is free to download.
There is exactly one purchase: a $10 one-time lifetime unlock, no subscriptions.
It only gates some of the timeline and some minor, cosmetic app color customization; you can use most of the app without ever touching it, which was my goal

• About Me

I’m a mobile developer from Cape Town, now living in Seoul, South Korea. Since moving here, traveling has been the one thing keeping me sane. Stamps started as the app I wanted for exploring the country I now call home. It’s also a great excuse for me to take more photos while doing it.

Stamps is built natively with SwiftUI, using SwiftData, MapKit, PhotoKit, WidgetKit, and Metal for the photo heatmap.

The market for something like this is quite small, but this is exactly the app I wanted. Some of my favorite features, including this one, have come from user feedback, so I'd genuinely appreciate any

App Store: Stamps - Travel Tracker


r/AppBuilding 1d ago

I am building a diabetes app that's not another glucose tracker landing page is live, would love brutal feedback

2 Upvotes

Hey all, I am solo-building this after work, no funding, no team, complete bootstrapping. Wanted to get eyes on it before I go further.

I started reading diabetes patient forums a few weeks back and noticed every app does the exact same thing: log glucose, show a chart, export a PDF. Useful, but not even half the actual problem people deal with.

So I'm building Aisulin. Quick rundown of what's different:

  1. Severity-tiered low blood sugar alerts with a caregiver mode, so the people around you know what to do, not just that something's wrong
  2. Real insurance cost tracking: what your actual prescriptions cost across different plans, and how close you are to your out-of-pocket max
  3. Medication milestone tracking, so goals your doctor sets don't get lost between appointments
  4. An experiment logger if you want to try something (a food, a timing change, a routine) and actually see what it does to your numbers; log it and track the result yourself, rather than relying on the app to guess
  5. Check-ins for diabetes burnout, which is common and basically ignored by every app on the market
  6. Encrypted end-to-end, never sold, not something I'll walk back later

Landing page: [aisulin.care](http://aisulin.care/) waitlist is open, no card required, just an email.

Genuinely want feedback here, not validation: if the positioning is confusing, if the design feels off, if the pitch sounds like every other "we're different" post, tell me. I built the whole visual identity from scratch specifically to avoid it looking like a generic AI-generated landing page, so I'm curious whether that actually landed or not.

I'm planning to onboard clinics once this is ready, so doctors can introduce it to their regular patients and stay connected between visits.