Garmin integration doesn’t work well enough
I often ride indoors with zwift and upload my activities to Garmin, but these activities don’t sync with PaceUP. So to record any of my indoor cardio, I have to manually copy over the information. They track duration and distance, but distance is only in km so I have to convert from miles to km every time.
When I record an activity outside on my Garmin watch, the integration works well.