Yannick

Full-stack dev · building Habit Arc — a calm, private habit tracker for Android 🌱 Free on Google Play👇

[Yannick @MillusPontius]

Habit Arc is live on Google Play.

I built it because most habit trackers punish you for one missed day. Streak gone, red X, back to zero.

Habit Arc doesn't do that. Miss a day and you recover on your next rep. No reset, you just keep going.

It's free, it works fully offline, and it's Android only for now.

#BuildInPublic #Android

[Yannick @MillusPontius]

Habit Arc: A private habit tracker built for recovery, not streaks https://t.co/GyGaicOGGD via @producthunt

[Yannick @MillusPontius]

It’s been a week since I put Habit Arc on Google Play, and a few people have already sent me feedback after using it.

I’ve just pushed an update based on that. Setting up your first habit should feel less fiddly now, reminders open the right habit when you tap them, and I fixed a couple of rough edges around check-ins.

Early days, but it’s nice seeing people actually use it.

#BuildInPublic #Android

[Yannick @MillusPontius]

Live: https://t.co/iJozx2e6U1
Blog: https://t.co/s3xmWDhbaM
GitHub: https://t.co/nJjLW7M4vf

[Yannick @MillusPontius]

Most SD-JWT tools just decode. Paste a token, get a JSON tree, done.

That wasn't enough for the EUDI work I was doing. I needed to know if a presentation would actually verify, and whether the request was over-asking for claims.

So I built a small local inspector. Paste an SD-JWT VC or an OpenID4VP request and it checks signatures, disclosure binding, and over-asking rules in the browser. No backend, so the artifact never gets uploaded anywhere.

Open source (Apache-2.0).
#EUDI

[Yannick @MillusPontius]

Update: Habit Arc is now public on Google Play

Download here:
https://t.co/ZVvrvgGgDN

[Yannick @MillusPontius]

Most habit apps punish a missed day — one red X, streak gone, you quit.

I built Habit Arc on the opposite idea: never miss twice. Miss a day and it helps you come back, not start over.

Free, Android, 100% offline. Looking for a few beta testers 👇

#NeedBetaTesters

[Yannick @MillusPontius]

What it is + how to join → https://t.co/0vU7FJJRRM (tap "Join the beta").

Honest ask: it's a Google closed beta, so I need ~12 people to keep it installed 2 weeks and actually open it a few times. No account, no ads, nothing ever leaves your phone.

[Yannick @MillusPontius]

You can try it here:
https://t.co/ZVvrvgGgDN

[Yannick @MillusPontius]

Habit Arc is live on Google Play.

I built it because most habit trackers punish you for one missed day. Streak gone, red X, back to zero.

Habit Arc doesn't do that. Miss a day and you recover on your next rep. No reset, you just keep going.

It's free, it works fully offline, and it's Android only for now.

#BuildInPublic #Android

[Yannick @MillusPontius]

Most habit apps quietly ship your data to a server. Mine can't.

Habit Arc has no INTERNET permission — the OS won't even hand it a socket.

Your habits physically cannot leave your phone. Privacy as a fact, not a promise. 🌱

#buildinpublic #androiddev

[Yannick @MillusPontius]

Two closed-test additions to Habit Arc lately, both feedback-driven: an in-app privacy policy link, and now a Rate button in Settings.

Unglamorous polish, but it's what gets you to production.

#buildinpublic #indiehacker

[Yannick @MillusPontius]

@mattpocockuk Will check it out !

[Yannick @MillusPontius]

@launch_llama Building Habit Arc:

https://t.co/ZVvrvgGgDN

A Habit tracker that helps you recover after a missed day instead of sending you back to zero. "Never miss twice" is the whole idea. Just shipped to closed beta.

[Yannick @MillusPontius]

https://t.co/EfDf3qnt5p

[Yannick @MillusPontius]

1/
My habit tracker runs on real behavioral science — growth curves, automaticity, recovery logic.

That's easy to put in the marketing and quietly fake in the code.

So I put the entire model in a pure Kotlin core with zero Android dependencies.

[Yannick @MillusPontius]

5/
Full write-up — the framework-free engine, offline-first design, and the lessons (including what I got wrong first) 👇

[Yannick @MillusPontius]

@MengTo Will check it out 🤝

[Yannick @MillusPontius]

@JonBuildsHQ @X Let's connect.

Building Habit Arc:

https://t.co/ZVvrvgGgDN