AMU 
Star Battle logic puzzle
Place the stars.
Clear your mind.
Every grid has exactly one solution, and pure logic can always reach it. No guessing, ever. No timer breathing on your neck. Just you, the rules, and the click of a star landing where it must.
- Daily puzzle & streak
- 1,900+ verified puzzles
- Hints that teach
- Zen mode
- 33 languages
- 100% offline
The rules
One star per row. Per column. Per region.
And no two stars may touch — not even diagonally. That is the whole game. Everything after that is your reasoning.
Pure logic, zero guessing
Every puzzle is computer-verified to have one unique solution that deduction alone can reach. If you are stuck, there is always a next step to find.
A daily ritual
One handcrafted Daily Puzzle. A streak that grows, freezes that protect it, and monthly medals to collect.
Hints that teach
Ask for help and Sidera explains the reasoning behind the next move. Every hint leaves you a stronger solver.
Designed to feel wonderful
Every star you place plays a note.
Solve the grid and you complete a small melody. Gentle haptics, pentatonic notes: progress you can hear as well as see.
Gentle by design
Ads appear only between puzzles — never while you think. Zen mode stays completely ad-free.
Private by design
Works offline, collects nothing, needs no account. Everything stays on your phone.
Perfect for
Slow thinking, any time
- Coffee-break brain training
- Fans of sudoku, nonograms and queens-style puzzles
- Flights and travel — fully playable offline
- Evening wind-down in Zen mode
- Streak collectors and daily-challenge lovers
Sidera Plus
One purchase, yours forever
- Zero ads, forever
- Full Daily Archive: play any past day
- Unlimited explained hints
- Exclusive themes and zen soundtracks
- Bigger streak-freeze stock