Stuck on a puzzle, found a bug, or have a question about the app? Here's how to get help.
Place stars so that every color region and every line (in each of the grid's three axis directions) has exactly the right number of stars — no two stars may touch, even diagonally. Double Star mode needs two per region/line instead of one. The in-app "How to Play" guide (book icon, top right during a puzzle) walks through this with examples.
Tap the lightbulb icon to reveal one logically-forced cell, along with a short explanation of the reasoning and a highlight on the board showing which region or line it came from. Using a hint disqualifies that solve from personal-best/leaderboard credit and the hint-free achievement, but never affects your streak.
A new Classic and a new Double Star puzzle are available every day, the same for every player. Solving one keeps your streak going — missing a day resets it.
Progress is saved locally on your device and to your account if you're signed in. If you signed in with a different account than before, or reinstalled without signing in first, local-only progress won't carry over. Email us if something looks genuinely corrupted rather than just missing.
Open Profile from the settings menu and use "Delete account" — this removes your leaderboard entries and cloud-synced data. See our Privacy Policy for details on what's stored and for how long.
Email us at the address above with what you were doing when it happened and, if possible, a screenshot. That's the single most useful thing you can include.