AstroKnot
A puzzle a day keeps the brain in shape
Your brain stays sharp when you challenge it. AstroKnot gives you one fresh logic challenge every day: a Star Battle puzzle that can only be solved by reasoning, never by guessing. Ten focused minutes, a real workout for attention and logical thinking.
Place the stars so every row, column and region has exactly the same number, and none touch. That's the whole rule set; the depth comes from the logic. Hints show you the next step instead of the answer.
Download on the App Store
A daily brain workout
One new puzzle a day, the same for everyone, with streaks and a speed leaderboard to keep the habit going.
No guessing, ever
Every puzzle is generated and graded by a solver that only uses human techniques. Logic always gets you there.
Hints that teach
Ask for help and the board highlights what to look at, names the technique and explains why it follows.
Pay once
25 free puzzles, then the daily and one puzzle of your choice stay free every day. One purchase unlocks everything. No ads, no subscription.