How do I calibrate my watch? Tap Profile in the bottom right corner of the app. Tap the settings gear next to your watch. Select Calibration. The app will walk you through the calibration process. Related articles How do I set my watch? How do I get a manual for my watch? Why did my watch screen go blank and stop showing data? Can I wear my Promaster Diver watch in a hot tub? How do I register my watch?