“The numbers you see first when you read through Apple's documentation are 10% and 17% that basically replace the 15 and 30% typical Apple cut. However Apple now charges 3% — that means you end up at 13% and 20% if you're using IAP.”

New 17%/10% commission balloons to 20%/13% once you add Apple's 3% payment fee

The headline 17%/10% rates only apply if you bring your own payment processor. Stay on Apple's billing and you pay 3% on top, landing at 20%/13% — far less attractive than the marketing suggests. The cut is closer to a few points of relief than half-off.