To access the metronome feature, tap on the Project Title from within a project to open the Project Details menu. Tap the Metronome option and turn it on.
Once enabled in a project, the metronome can be easily toggled on or off using the metronome icon at the top right corner of the page. The icon will be yellow when enabled.
For easy access to the metronome menu, tap and hold the metronome icon. From there, you can adjust the time signature and tempo. Short taps will increase the tempo by +/- 5. Long taps by +/- 1. Once you set the metronome, tap "Done" at the bottom of the screen to exit the menu.
When you start recording you'll hear the click track, so use wired headphones or AirPods to record.