Last updated: April 29, 2026
GridSum ("we", "our", or "us") is committed to protecting your privacy. This policy explains what data we collect and how we use it.
Account data: If you sign in with Apple or Google, we receive a unique user ID and email address to create your account.
Gameplay data: We store your puzzle progress, coins, and solve history to sync your experience across reinstalls.
Device data: We collect anonymous usage analytics (puzzle completions, difficulty, time) via Firebase Analytics to improve the game.
Advertising: We use Google AdMob to show ads. AdMob may collect device identifiers and usage data to serve relevant ads. See Google's Privacy Policy.
Push notifications: If you grant permission, we store your device push token and timezone to send daily puzzle reminders. You can disable notifications at any time in iOS Settings.
We retain your data as long as your account is active. You can request account deletion from the Profile tab in the app.
For privacy questions, contact us at orihyams@gmail.com.