Apple is tweaking how it applies a new fee that can affect iOS developers in the European Union as it continues to configure its approach to the bloc’s Digital Markets Act (DMA): Developers of free apps will be able to avoid the fee entirely under changes it announced Thursday, which apply from today, while other developers earning under a certain revenue threshold will get longer before they have to pay Apple the fee. The core technology fee (CTF) remains opt-in for iOS developers in the region...