Apple is rolling out a software update for millions of iPhone and iPad devices, bringing with it a lot of new features. Unfortunately, the update will break compatibility with a lot of very cool apps. Luckily, there’s a way you can check which of your favorite apps won’t be compatible once you download the update.

The change is happening because Apple is moving from 32-bit apps to 64-bit apps, which the company has been working toward since iOS 7 was released in 2013. Incidentally, Apple released a warning to developers when iOS 11 was announced in June:

As a reminder, new iOS apps and updates submitted to the App Store must support 64-bit. Support for 32-bit apps previously installed on a user’s device will not launch. If you haven’t updated your app on the App Store to support 64-bit, we recommend submitting an update so your users can continue to run your apps on iOS 11, which will be in the hands of hundreds of millions of customers this fall.

Apple makes it easy to check which apps won’t work with iOS 11. Simply open Settings > General > About > Applications. If you have apps that aren’t compatible with the update, you’ll be shown a list, with a word from Apple encouraging users to contact app developers “for more information.”

If all of your apps are compatible with the update, you won’t see an app compatibility list at all, so don’t fret if nothing shows up—that’s a good thing. Hopefully, if you do have a lengthy list of apps that are soon-to-be defunct, developers will be encouraged to introduce an update for iOS 11.

If anything, it might be a reminder of what apps you didn’t even realize you had or don’t really need. Chances are there is a solid alternative to the apps that Apple is leaving behind. If that’s not an option for you, you don’t need to update to iOS 11 as soon as it’s available.

To prepare your device for today’s iOS 11 update, refer to this guide.