Sometimes iPhone users can have problems with the 'start workout' button if their Location Services aren't set a certain way. To make sure that the app doesn't automatically close after 3 minutes into the workout, some users will have to allow us to use their location. We only track your location while the workout is playing.
To turn your location services on for Fitmo, the steps are as follows:
Step 1: Head to your iPhone settings, and select 'Privacy'
Step 2: Once there, press 'Location Services'
Step 3: From the list of apps, find and select Fitmo.
Step 4: You'll be shown the screen below. Make sure you choose 'Always'.
Let me know if this helps you out!