Quick help
Purchase unavailable
Confirm that you are signed into the platform store, purchases are allowed in your device settings, and your device has an active internet connection. Then fully close and reopen STACK.
Ad unavailable
Rewarded ads require a network connection and available ad inventory. Wait briefly, check your connection, and try the rewarded continue again.
Full Game missing
Open the Shop and choose Restore Purchases while signed in with the Apple ID or Google account that originally completed the purchase.
Progress missing
STACK saves progress locally on the device. Check that you are using the original device and have not removed the app or cleared its storage.
Purchases and restoration
Platform stores process in-app purchases, with RevenueCat supporting entitlement validation and restoration. STACK never asks for your card number or store password.
- Confirm the purchase finished successfully in the platform store’s purchase sheet.
- Keep STACK open until the purchased item appears.
- Use Restore Purchases from the in-game Shop if the Full Game unlock is missing.
- If a gem purchase was charged but not delivered, do not buy it repeatedly—contact support with the details below.
Consumable gem packs
Gem packs are consumable purchases and are not restored like the Full Game unlock. If a completed transaction was not credited, contact support so the transaction can be investigated.
Refunds and billing
Billing and refund requests are handled by Apple or Google, depending on where the purchase was made. Use the store’s purchase history and support tools for the relevant transaction.
Rewarded ads and privacy choices
Watching a rewarded advertisement is optional. A continue is granted only after the advertising provider reports that the reward requirement was completed.
- Check that Wi-Fi or cellular data is working.
- Disable a VPN, DNS filter, or ad blocker temporarily and retry.
- Wait 30 seconds before retrying if an advertisement fails to load.
- Do not close the advertisement before the reward confirmation.
- Use the in-app privacy choices control when it is available for your region.
Ad availability is not guaranteed in every region or at every moment. If an advertisement closes without granting the continue, include the approximate time and what appeared on screen when contacting support.
Progress and saved data
Game progress and settings are primarily stored on the device, including scores, unlocked skins, gems, achievements, sound settings, and play statistics. Removing the app, clearing its storage, or changing devices may remove local progress unless it is preserved by a device backup.
Purchases remain associated with the original platform account and can be restored through the in-game Shop. Consumable gem balances are not a permanent entitlement after they have been spent.
Contact support
Email the developer and include enough information to reproduce the issue. Do not send passwords, complete payment-card details, purchase receipts with unnecessary personal information, or other sensitive information.
- Device model and operating-system version
- Game version and build number
- Approximate date and time
- Screenshot or exact error message
- Purchase product, if applicable
- Steps that caused the problem