Sud💜ku

View source on GitHub

A screenshot of a Sudoku game with some values filled in and a purple-on-black theme. There are some cells with notes of possible numbers, and every cell with the number 7 is highlighted because the user has selected that number. There are buttons at the bottom to restart, validate, note, and undo.

A screenshot of a similar Sudoku game, but the theme has been changed to have a white background and an orange color.

Summary

As I set up my de-Googled phone, one app I could not find a satisfying FOSS replacement for was my Sudoku app.
I decided to instead write this one both as a way to learn Flutter/Dart and as a surprise present for a friend.
It turned out very polished, and I am really happy with it! It is published on the free and open source F-Droid app store.

Tech Used

Flutter
Dart pub.dev packages
Android Studio

Things learned

Android app workflow
Fastlane metadata setup (for F-Droid)
Performant UI code design
Async APIs with futures and promises

My Role

I wrote this whole project myself.