Your drill mines automatically. The amount is your mining speed × the time that passes, so a faster drill fills your storage sooner. Mining continues while the app is closed — open the app and harvest to move what you mined into your balance.
Yes. A harvest is completed by watching a short ad through. The ore is what the ad revenue pays for, which is why the ad comes with it.
Mining stops accruing. It resumes as soon as you harvest, so it is best to harvest before your storage fills up.
Collect boost % from the daily check-in, the lotto, the gold price guess, inviting friends, and offerwall missions. Boosts stack for a limited time and raise your mining speed while they last.
Outside Korea you can be paid through PayPal, or take a mobile airtime top-up. Open Cash out in the app and follow the steps. (In Korea, payouts are made by bank transfer or gift voucher instead.)
The minimum depends on your country and starts at $1. The payout screen shows the exact figure for you and how much more you need. The exchange rate also differs by country, so the app always shows the amount you will actually receive before you confirm.
PayPal payouts are reviewed manually and sent after approval, so they take a few business days. Small mobile airtime top-ups may be sent automatically right away. Double-check your PayPal email or mobile number before you submit — we send to exactly what you typed, and it cannot be recovered afterwards.
Yes. For safe payouts you need to link a Google account first.
When your friend signs in and makes their first harvest, both of you receive a bonus in ore — the amount is shown on the invite screen in the app. Your friend also gets a welcome boost that makes their drill much faster at the start.
No. After your friend is active, 30% of the ore they harvest keeps accruing into your friend bucket for as long as they play. Tap Collect friend ore to move it into your balance.
Yes. As the inviter you are rewarded for up to 100 friends per day. Friends beyond that still appear in your list but are not rewarded that day — the limit resets the next day. The friend you invited is always rewarded.
Paying or organising people to install the app and complete one action just to trigger invite rewards. Those rewards can be invalidated and payouts restricted — see section 7 of the Terms of Service.
Every day at 09:00 (KST) you are ranked by the mining speed boost % you hold at that moment.
A share of your own boost is added on top, depending on your rank (1st +10% … 401st–500th +1%, valid for 1 day).
You can mine as a guest, but cashing out requires a linked Google account. Linking also keeps your progress when you change phones — sign in with the same account on the new device.
Open Settings → My account → Edit my info → Delete account. Your remaining ore and balance are forfeited, so cash out first. Details: Account deletion.
Use Settings → Email us in the app. Please do not delete the User ID and app version the email fills in for you — that is how we find your account. (doncaedrill@gmail.com)