Prime Tower is a number-puzzle stacking game about factors, multiples, primes and divisibility.
How to play
A crane swings a numbered block. Tap anywhere to drop it. The sign at the top shows the rule; a block whose number fits the rule stays on the tower, a block that does not fit shakes it and costs one shield. You can also let a block fall aside. Finish the tower to earn stars and unlock the next level. The “?” button on the level map replays the tutorial.
Frequently asked questions
- What are the four rules?
- Factor or Multiple, Primes Only, Divisibility (including common multiples) and Prime Factors.
- How do stars work?
- Each level has four goals — speed, a streak of correct blocks, no drops, and passing on the first try. Every goal has a half-star tier and a full tier, so a perfect run earns three stars. Stars are given only when you finish the tower.
- What are lives?
- Losing a level uses one of your five hearts. Each heart comes back after 5 minutes, even while the app is closed.
- Does the game need internet or an account?
- No. Prime Tower is fully offline and has no accounts, ads or tracking.
- How do I turn sound or haptics off?
- Use the speaker button on the level map.
Contact
Found a bug or have a suggestion? Email aslanmemo@gmail.com and mention your iPhone model and iOS version.