Did anybody try to swim with 645? After setting the length of pool it still counts badly, for example today, 6 faster lengths of breaststroke in 25m pool counted only 3. Have any experience? To make any special "move" at the end of each length?
Breastroke presents a challenge for most devices. Sorry, but a review of swimming issues with all the devices that track swimming will show that to be the case most of the time.
I use the FR645 also a few times for pool swimming and got the same problem, till now I did not have one swim training with the correct amount of lengths. On my previous FR630 (who died to early, after 2,5 year) with the IQ app poolswim counted the lengths correct, so this is what we call a software bug. Garmin please solve and update.