To download GarageBand on a device running , you will likely encounter a compatibility error because the current version of the app requires iOS 17.0 or later . However, users on forums like Apple Community

You get v1.5.7 legally unless:

I can provide or performance optimization tips for your exact device.

to a friend’s or family member’s newer iPhone/iPad with your Apple ID. Search for GarageBand in the App Store and tap Get .

: If you have downloaded it before with your Apple ID, a cloud icon will appear instead of a "Get" button.

While the latest version of GarageBand typically requires or later, you can still download and use it on a device running iOS 15.7 by accessing a "last compatible version". Downloading on iOS 15.7