Our January 2018 update, 6.57, introduced a stationary trainer mode. This tells the device to not look for a GPS signal, but still allows you to record sensor data or run a workout.

Here's a quick run through on how to set it up.

1. You'll want to make sure your GPS device is paired with your phone.
2. Open your Lezyne Ally App.
3. Go to the More tab on the right and then select GPS settings.
   
4. Select Bike and Screen setup.
   
5. Select the bike profile that you want to use for workouts.
   
6. Select Bike.
   
7. Select Stationary mode.
   
8. Tap the "switch" to turn it on.
   
9. Hit OK.
10. Save your changes.
11. Now, when you turn the device on and select the bike, it will ask you to select Ride or Stationary.