To get the Apple Watch to display the Arccos app when you raise your wrist, please follow the steps below: 

1. Open the Apple Watch app on your iPhone

2. Select General and then Wake Screen 

3. Make sure Wake on Wrist Raise is turned on 

4. Make sure that under the Return to Clock section, you have selected After Crown Press

5. Scroll down and select Caddie from the list of available apps

6. On this screen, select Custom and After Crown Press