Sebastian Dendtler

About

S.E.B.O. Development is an independent software studio from Germany, building simple, privacy-friendly apps that solve everyday problems. We focus on clean design and a no-fuss experience — powerful where it counts, without the clutter. Our flagship app, TimeLog, helps freelancers and anyone who bills by the hour track their time and turn it into invoices, available on Android and the web in English and German. As a small, independent team, we build in public, listen closely to our users, and ship updates fast. Every app we release is made to be genuinely useful, reliable, and respectful of your data.

Badges

Tastemaker
Tastemaker
Gone streaking
Gone streaking
Gone streaking 5
Gone streaking 5

Maker History

  • FlutterMind
    FlutterMindLearn Flutter by doing — right in your browser, no setup
    Jul 2026
  • Time Log
    Time Log Time tracking that turns hours into invoices
    Jul 2026
  • 🎉
    Joined Product HuntJuly 6th, 2026

Forums

Launching tomorrow: a hands-on Flutter course — built in Flutter

Hey everyone! Tomorrow I'm launching FlutterMind an interactive course that teaches Flutter & Dart right in your browser (editable live demos + auto-checked exercises, no setup). The fun part: it's a Flutter app that teaches Flutter.

I built it solo as a self-taught beginner, because the resource I wanted didn't exist in German.

Before I go live, I'd love to hear from you: What made Flutter finally "click" for you or what almost made you quit early on? Trying to make sure the course tackles the real sticking points.

FlutterMind

FlutterMind - Learn Flutter by doing — right in your browser, no setup

FlutterMind is an interactive course that teaches you Flutter & Dart — and it's built in Flutter itself. Learn right in your browser: structured lessons, editable live demos, exercises with instant auto-checking, a one-click jump to DartPad, plus a widget gallery and quizzes. No download, no setup. Start free; unlock everything with a one-time €9.99 — no subscription. Built by a beginner, for beginners.

Hi PH — I'm a solo dev and just built Time Log, a time tracker for freelancers

Hey everyone

I'm Sebo, an indie developer from Germany. After losing track of my billable hours one too many times and getting tired of bloated, subscription-only trackers I built Time Log.

It does one thing well: start a timer with one tap, sort entries by project or client, and turn your hours into an invoice. On Android and the web, in English & German.

It's fully bootstrapped and I'm building it in public. I'd genuinely love your feedback what's confusing, what's missing, what would make you switch?

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