Overfill

The bar does not stop at 100%.

An idle game about one bar, five upgrades, and knowing when to spill.

131% over

Everything past the line is what you get to bank.

Overfill runs one bar at one rate in real time. It fills while the app is open and keeps filling while it is closed. Completed bars mint coins, coins buy upgrades, upgrades change how the bar behaves.

Then the part it is named after: the bar keeps going half again past full, and everything above the line converts into points you can bank. Banking them clears your coins, your bar and all five upgrades, and hands back a permanent multiplier. That is the only long-term decision in the game, and the sheet that offers it states what it costs before you take it.

The play screen: a bar filled to 131% over, with the five upgrades listed below it. — Past full, and still going.

The offline report: how long you were away, how many bars filled, and what it earned. — It settles the time you were gone.

The Spill Over sheet, stating what you bank and what it clears before you confirm. — The reset states its price first.

Five upgrades, five different jobs

Flow fills faster. Short Pour needs less to fill. Reservoir holds more while you are away. Spill Value makes the overflow pay better. Momentum makes the bank worth more. Fifty-two levels between them, priced so the order you buy in matters — there is no single correct sequence to look up.

While you were gone

Close the app and the bar carries on. Reservoir starts you at two hours of accrual and takes you past thirty when it is fully bought. Come back and a report tells you how long you were away, how many bars filled, and what it earned. If you hit the ceiling, the game says so rather than pretending it was still counting.

The things worth knowing before you install

Free, with ads. The opt-in one gives you a double-rate hour and only runs if you tap it. The unprompted kind is rationed in code: none in the first ten minutes, five minutes minimum between them, three per session at the outside.
One purchase removes those permanently, and Restore brings it back on your other devices.
Two reminders, both off until you turn them on. That is the entire notification surface.
Your save is a file on your device. No account, no sign-in, no server. The privacy policy is specific about what the ads collect and what you can switch off.
Nothing here is random. The bar fills at a rate you can read off your own upgrades, and every price is on screen before you pay it.

iPhone, iOS 17 and later.