NumSum
A relaxing number puzzle game
NumSum is a minimalist number puzzle you can play anywhere. Eliminate cells so every row, column, and colored region adds up to its target. Solve at your own pace — there are no timers, no leaderboards, and no pressure.
Why NumSum?
Fully offline
No account, no internet connection, no server. Just open and play.
Zero tracking
We collect nothing. No analytics, no advertising IDs, no telemetry.
No ads, no IAP
One clean experience. No banners, no pop-ups, no purchases.
Quick to learn
One simple rule. Hundreds of hand-tuned puzzles to enjoy.
Family friendly
Rated 4+. Designed to be safe and enjoyable for all ages.
Respects your time
Each puzzle takes 5–10 minutes. Perfect for short breaks.
How to play
Each puzzle is a grid filled with numbers. Every row, column, and colored region has a target sum displayed beside it. Tap cells to eliminate them until the remaining numbers in each line add up to the target. That is the entire rule.
Get NumSum
NumSum is available for iPhone and iPad on the App Store. An Android edition is in development.