CompareOpen in Google PlayApp info
- Installs
- 1,000,000+
- Category
- Puzzle
- Content rating
- Everyone
- Version
- 2.0.7
- Released
- Mar 14, 2017
- Last updated
- 11 Sept 2026
- In-app purchases
- Yes
- Contains ads
- Yes
- In-app price range
- $2.99 per item
- Promo video
- Yes
- Requires Android
- 7.0
4.08,438 ratings
5
4,415
4
1,828
3
826
2
243
1
1,083
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What's newin version 2.0.7
A locked line can be unlocked again. Holding a completed line's target locks the whole line. Nothing used to undo that — and a line can be right on its own while the rest of the board cannot live with it, which left the grid looking unsolvable. The same hold now frees the line, and the board's "?" explains both. Thanks to the player who reported it. — The Rullo Team
About this app
Math brain teaser: switch numbers off so every row and column hits its total.
Read full description
Every row and every column has a target. Switch numbers off until each line adds up to it. Easy to learn, and it will keep you thinking. FOUR WAYS TO PLAY Classic — Four operations, four sizes Endless — One grid after another Expert — Mixed operators in every cell Beat the Clock — Your best time to beat LEADERBOARDS Three boards to climb: Day, Season, Global. BUILT TO BE READ Three grid sizes in Settings, so the board fits your screen and your eyes. You can pick the colour of the active cells too. THE BOARDS 5×5 to 8×8. Add, subtract, multiply, divide. Number ranges 2-4, 1-9 and 1-19. Plays without a connection — your scores are sent the next time you are online. — The Rullo Team