Your ink stays ink.
Recognition adds meaning without replacing your strokes with typeset digits.
Handwritten logic puzzles for iPad
Logic,
written by hand.
Futoshiki Sky turns your iPad into a quiet puzzle book. Write with Apple Pencil, keep your own ink on the page, and ask for help only when you want it.
All twelve constellations, Daily Challenges and unlimited Free Play are free, with no in-app purchases or subscriptions.
The idea
Futoshiki was made for paper. The iPad should feel just as direct.
The printed puzzle stays exact and architectural. Your handwriting stays organic and personal. The software works quietly underneath both.
Intelligence stays quiet.
No interruptions while you think. Hints reveal one useful step only when you ask.
Your work stays private.
Handwriting recognition and puzzle generation happen on your iPad. No account is required.
Futoshiki Sky