How can we help.
EFFECTIVE JULY 22, 2026
Contact
For app issues, feedback, privacy questions, or feature requests, email Gaku support. Including your iOS version and a short description of what happened will help us investigate.
IP.VANTWO@GMAIL.COM ↗Sync problems
Your learning progress is saved locally first. If sync is interrupted, keep the app installed and try Sync now again after confirming that you are signed into the intended Apple or Google account.
Delete your account
Open Settings, select Sync, and choose Delete account. This removes your account and synced cloud data. Your local learning data remains on the device unless you reset your progress or remove the app.
Notifications
The optional daily reminder is scheduled for 9:00 PM in your device’s local time. You can turn it off in Gaku’s Settings screen or manage notification permission in iOS Settings.