@matteo_000 Yes, please! There are many situations where one gets duplicate activities and needs to merge them. Otherwise the app thinks you’ve done 2 workouts which distorts all the health, fitness & recovery metrics.
Example: when I ride my smart trainer, it uploads the activity to Suunto. But it doesn’t measure heart rate. To get that I have to use my Suunto watch and record the activity. It appears in the app as 2 activities but is really a single one.
If the activities have timestamps in them, the merge can be quite smart about it, lining up the timestamps. That way if it won’t get confused if they start or end at different times.