On Primal Android: Open side menu, go to Settings, go to Wallet, uncheck Use Primal wallet and Connect Mutiny Wallet appears. Tap the button and follow instructions. 

 I only use Primal web based, can I do it there? If not, is there a way to load Primal on Android without using the Playstore? 

 You can download the APK from:
https://github.com/PrimalHQ/primal-android-app/releases

You could also setup Obtainium for fetching updates in the future. At some point we'll add f-droid support as well. 

 Perfect! Thank you.