Sidera: Star Battle Puzzles

Place the stars. Clear your mind.

Sidera turns Star Battle — the beloved logic puzzle — into a calm, beautiful daily ritual. Every puzzle has exactly one solution, reachable by pure logic. No guessing, ever.

HOW TO PLAY
Fill the grid so every row, every column and every colored region contains exactly one star — and no two stars touch, not even diagonally. Simple rules, deep thinking.

★ A NEW PUZZLE EVERY DAY
One handcrafted Daily Puzzle, a growing streak, freezes to protect it, and monthly medals for completed calendars.

★ 1,900+ VERIFIED PUZZLES
Five grid sizes (5×5 to 9×9) and five difficulty levels, from friendly to extreme. Every single puzzle is computer-verified to have one unique solution solvable with logic alone.

★ HINTS THAT TEACH
Stuck? Sidera doesn't just reveal a cell — it explains the reasoning, so every hint makes you a stronger solver.

★ ZEN MODE
No timer, no error marks, optional ambient soundscapes. Just you and the stars.

★ DESIGNED TO FEEL WONDERFUL
Each star you place plays a rising musical note — solve the puzzle, complete the melody. Subtle haptics, gentle soundtracks and a glowing celebration make every victory satisfying.

★ YOURS, EVERYWHERE
33 languages. Fully playable offline. No account, no sign-up. Your progress stays on your device.

★ FAIR BY DESIGN
Ads appear only between puzzles — never while you think. Prefer silence? Sidera Plus (one-time purchase) removes ads forever and unlocks the full Daily Archive, unlimited explained hints, exclusive themes and more.

If you enjoy sudoku, nonograms, kakuro, binairo or queens-style puzzles, Star Battle will feel like home — and Sidera is its most polished home on Android.

Crafted with care by an independent developer. One puzzle at a time.