It shows fixed stat output for normal enhancement levels and separately estimates Amplify Stone and Kinah costs for Breakthrough stages. The cost figures are averages because Breakthrough success uses chance.

Each Breakthrough stage has a base success rate that increases after a failure through its fail-correction value. The simulator applies that ramp when estimating attempts, Kinah and stones.

From each item’s local enhancement and exceed-enhancement records: stat output, Kinah cost, Amplify Stone quantity, success rate and fail-correction value.

No — they are expected averages. A lucky streak costs less and an unlucky one costs more, but over many attempts the totals shown are what you should budget for.

No. Gear Forge runs entirely in your browser, free, with no login or sign-up.