Understone minerUnderstone

App Support

Last updated: October 10, 2026

Plan each dig

Tap an unexplored cell to reveal it. Opening a gem spends its mining cost immediately. Tap the mined gem again to collect it for free and earn XP. Empty cells and clue numbers are free; a clue adds the mining costs in its eight neighboring cells. Red warning marks count neighboring lethal mines.

Recover stamina and keep exploring

Stamina may reach zero. Eat a revealed hamburger when you need a full refill, or upgrade manually after earning enough XP. Restarting a failed floor creates a fresh map and restores that floor’s entry state. The interactive practice tutorial is available when starting a new game and from the in-game help page.

Free opening and full expedition

The opening district has three free floors and a camp shop. Leaving that first camp opens the one-time Unlock all field sites purchase. The unlock covers the remaining campaign across eight districts and 24 floors, with no subscription. Apple displays the price in your App Store currency. Camp items use earned game coins, not real money.

Purchase and restore help

Purchases are processed by Apple. Use Restore purchases on the unlock page with the same Apple Account that made the purchase. A pending purchase unlocks after Apple confirms it; canceling preserves your progress. If prices or purchases are unavailable, check your connection, retry, and contact us if the issue continues. Do not buy again to resolve an existing purchase. Apple refund requests are handled at reportaproblem.apple.com.

Progress and sound

Load Progress resumes the expedition saved on this device. New Game replaces the current expedition; completed local scores and sound settings remain. Settings lets you adjust music and effects or return to the main menu. This release has local scores and no online account or developer-operated cloud sync. Device backups are controlled by Apple and your settings.

Contact support

Email support@ideaspike.com with the app version, device, iOS version and a short description of the problem. Do not send passwords, full payment details or unnecessary personal information. TestFlight transactions use Apple’s sandbox and do not charge real money.