Support

Questions, bug reports, and feature requests welcome.

Frequently Asked Questions

Is the app free?

Yes, completely free. Ads support maintenance and improvements. Ads are never shown during animations.

What OS versions are supported?

iOS 17 and later (iPhone / iPad), Android 8.0 (API 26) and later.

Which algorithms are included?

Sorting (6): Bubble / Selection / Insertion / Merge / Quick / Heap
Searching (4): BFS / DFS / Dijkstra's algorithm / A*
Recursion: Tower of Hanoi / Koch curve / Sierpinski triangle / Recursive tree

What is Race Mode?

Race Mode runs multiple algorithms on the same initial array side-by-side and compares finish order plus compare/swap counts. Watch Quick Sort blow past Bubble Sort in real time.

How do I change the language?

The app follows your device language (Japanese / English). Change your OS language in Settings.

How do I change tracking permissions later?

iOS: Settings → Privacy & Security → Tracking → ARURAKU.
Android: Settings → Privacy → Ads → reset advertising ID.

How do I report a bug or suggest a feature?

Please contact us via the email below. Including reproduction steps, device model, and OS version is appreciated.

Contact

Fuji Bit Inc.
Email: support@fujibit.com

We typically respond within 2–5 business days.