https://wccftech.com/protonmail-claims-apple-forced-it-to-include-in-app-purchases-to-its-free-app/

The CEO of ProtonMail, a service that provides secure encrypted email, has shared that Apple forced the company to include in-app purchases to its free app. The app had been free for years in the App Store, since its launch in 2016 but when it gained popularity, Apple contacted them and told them that they had to add in-app purchases.

Just like any other startup that has built a user base on iOS, ProtonMail had to comply to ensure that they could reach their customers. As per CEO Andy Yen, the company did not offer a paid version of their app in the App Store. Apple stumbled upon a section in the app which mentioned paid plans, and ProtonMail’s app had a subscription on offer.