Apps and games that haven’t been updated in at least two years will be scrubbed.

Developers of various apps listed on the Apple App Store, used on iPhone and iPad mobile devices, have recently reported receiving an “App Improvement Notice” from Apple. The message explains that Apple is removing apps from its storefront that have not been updated in at least two years, and is giving developers a 30-day advance notice to provide some manner of update.

“You can keep this app available for new users to discover and download from the App Store by submitting an update for review in 30 days,” Apple’s email reads. “If no update is submitted in 30 days, the app will be removed from sale.” Any iPhone users that have already downloaded the app in question will still be able to use it, but they will no longer be able to redownload it from the App Store.

Apple explained the reasoning for this process on its App Store Improvements page. “To make it easier for customers to find great apps that fit their needs, we want to ensure that apps available on the App Store are functional and up-to-date. We are implementing an ongoing process of evaluating apps, removing apps that no longer function as intended, don’t follow current review guidelines, or are outdated.”

The notice has drawn ire from many app developers, especially developers of games whose products are already complete and don’t require any kind of update.

“”Now I am expected, along with Google’s new program, to update all of my games every 2 years even if nothing is wrong with them,” wrote Robert Kabwe, sole developer of Protopop Games, in a series of tweets.

“Now I need to dig up my project file, update the Unity version to make sure it meets the App Store requirements, rebuild, retest, resubmit all to get the exact same game in the exact same place it was before.”