Support
Last updated: 24 October 2026
Answers to common questions. If yours is not here, email lumistacksupport@gmail.com and include your device model, your OS version and the app version.
How do I play?
Open a topic card to start its group. Tap a word card to move it into the group it belongs to. When a group is full it clears, and the cards underneath are uncovered. Clear every group before your moves run out.
How do duels work?
- Open the Duels tab and tap New duel. The app makes a board and gives you a code.
- Play the board, then share the code with a friend.
- Your friend enters the code under Join with a code. They play the same board.
- Both results appear under Duels, so you can compare moves and time.
- A duel expires after 30 days.
How do I delete my data?
- Cloud copy and duels you created: Settings, then Data, then Delete my cloud data. This erases your cloud backup and your own duel results. Results that friends recorded on a duel you created stay until it expires.
- Progress on this device: Settings, then Reset progress. This erases your levels, stars, coins and boosters on the device. Purchases stay on record and are not added again.
- Everything on the device: delete the app. This removes its local data from the device.
How do I buy coins and restore purchases?
Open the Shop to buy a coin pack. Payment is handled by the Apple App Store or Google Play.
If a purchase does not show after you reinstall, open the Shop and tap Restore purchases. Use the same Apple ID or Google account you bought with. Coins that you already spent cannot be restored.
Can I turn off reminders?
Yes. Turn off the daily reward reminder in Settings. You can also turn off notifications for Lumistack in your phone's system settings.
Does the app need an account or internet?
No account is needed. Core play works offline. Cloud backup and duels need an internet connection.
Contact
Email lumistacksupport@gmail.com. Please do not send payment card details.