CalcGrid
Math puzzles, no nonsense.
Fill in the missing numbers so every row and column adds up to its target. A focused, beautiful cross-math puzzle for iPhone and iPad.
Tap a cell, pick a number, watch the equations resolve.
Built for daily play
Four hand-tuned difficulties, a fresh puzzle every morning, and no nags between you and the next one.
Four difficulties
Easy through Expert. Smart hidden-cell ratios that scale with grid size and operators.
Daily challenge
A new puzzle every day, identical for everyone. Streaks, stats, and a gentle reason to come back.
No ads, ever
No banners, no rewarded videos, no tracking. The free tier is generous on purpose.
Mistakes are okay
Hints, undo, and clear-mistake highlighting let you learn without restarting.
Five themes
Classic, Dark, Neon, Minimal, Retro — pick what looks right at 7am or midnight.
Stats that mean something
Streaks, best times, average solve, mistake rate — all on-device, all yours.
Free to play. Premium for keeps.
Free includes all difficulties, the daily challenge, and three hints per puzzle. Premium is one purchase — €4.99 — for unlimited hints, all themes, and challenge mode.
Coming soon to the App StoreFrequently asked
Is CalcGrid like Sudoku?
It's adjacent. Sudoku is about logic constraints. CalcGrid is arithmetic — every row and column is an equation that has to evaluate to its target. Different muscle, same satisfaction.
Does it work offline?
Completely. The whole game ships with the binary. The only network calls are App Store license verification.
What data do you collect?
None. No analytics SDK, no trackers, no accounts. Stats stay on your device. Read the privacy policy.
iPhone, iPad, both?
Both. Universal app, iOS 17 and up. Looks great in portrait on phones and lets you rotate freely on iPad.