Business Insider:

In April 2017, a group of over 30 software developers gathered at a luxury loft in New York City's trendy Tribeca neighborhood after receiving an invitation from Apple. They didn't know exactly why they had been summoned, but all of them had one thing in common: they developed apps for Apple's devices, according to people who attended the event.

The developers at Apple’s loft soon realized the hardware giant needed something from them: Apple was a few months into a major shift in the App Store’s core business model, and it needed buy-in from developers.

Developers, Apple said, needed to realize the business model of apps was changing. Successful apps tended to focus on long-term engagement instead of upfront cost. Indie developers who wanted to capitalize on this needed to move to a subscription model, as Apple had made possible in the past year in a splashy announcement.

That’s certainly one way to raise the “Services" side of the Apple business.

I know that subscriptions for apps are controversial, but it’s a great way for devs to build a regular income - and for apps you use the most, I 100% feel that’s worth it.