Apple is getting deeper into the AI game with iOS 10, which will require users to share some data with Apple so it can make intelligent suggestions, but the company says it will be totally optional.

Starting in iOS 10, Apple plans to use differential data as a way to track users and make Siri better at predicting what you want, while not being a major creeper at the same time. The company hasn’t been very clear about exactly what data it will be collecting, but according to a new report, we now know you will have to opt-in to the service.

Now that WWDC has wrapped, the folks at Recode got Apple to clarify its differential privacy and found out it will be limited to four cases at fire: words added to local dictionaries, emojis typed, deep links used inside apps and lookup hints within notes.

Apple hasn’t begun collecting data yet on users, but once iOS 10 launches it will require users to give Apple their consent. You’ll most likely get a prompt on the iOS 10 intro screen asking if you want to participate.

With iOS 10 Apple is also bringing AI to the photos app by intelligently recognizing faces, objects and locations. Some feared that Apple would train its AI algorithm by scanning iOS users’ cloud-stored photos, but the company says it’s not using iPhone users’ photos and instead relies on other data sets to train its algorithms. It won’t say what that data set is though.

Most of the predictive work of iOS 10 will be done on your iPhone instead of in the cloud, allowing Apple to tip-toe between providing privacy and security to users, while giving iOS the AI power it needs to compete with the likes of Android, Microsoft and Facebook.

iOS 10 is set to launch publicly this fall with other major features coming Messages, Photos, Siri, the Lock Screen, Notification Center and more.