How can I use the third party APP in S15?

The S15 is open Android system and supports almost all Android apps. And there are two methods to install third-party apps.

Method 1, you can connect to WiFi and go to FiiO Market, Google Play or other apps market to download relevant apps and install them directly.

Method 2, local installation, copy the downloaded APK to S15 from your computer, then go to the file manager to find the corresponding APK and click to install.

How to log in to Apple Music APP?

Since most apps are optimized for portrait mode and fewer are adapted for landscape mode, the default display size on the S15 does not allow the Apple Music login interface to fit. Please go to the Settings > Display menu to adjust the “Display Size” to “Small” to scroll and access the account login interface.