A Material You Expressive alternative to DSBmobile — your school’s substitution plan, reimagined. Native, fast, and beautiful on every Android.
The official DSBmobile app hasn’t received an update in over two years and isn’t native at all. Astra is a from-scratch, open-source rebuild that loads your school’s substitution plan with a modern Material 3 Expressive interface — including dynamic color from your wallpaper.
A focused set of features built around the Material You design language.
Cutting-edge Material 3 Expressive components — rounded 28dp surfaces, smooth motion, and the Google Sans Flex type system.
On Android 12+ the app builds its whole color scheme from your wallpaper, or pick one of 7 curated seed palettes.
Host the current plan as a single self-contained page on your local network — open it in any browser on any device, no app needed.
A glanceable widget keeps the plan visible right on your home screen, matching your theme.
Background syncing refreshes the plan automatically, so the latest substitutions are always there when you open the app.
Scroll the archive of past days or browse the whole plan in a calendar view, and share any day as a beautiful card.
Fully localized in German, with correct time and date formatting — right at home in a German school day.
No ads, no tracking, no account. Apache-2.0 licensed and built with contributions in mind.
Expressive shapes, tonal surfaces and dynamic color — screenshots from the app.
