Best watch movement tracker around!
Practical watch setting tool
There is also a watch accuracy tracking function, which is probably sufficient for identifying when a watch needs servicing. It relies on manually inputs so isn’t a very precise way of tracking the actual deviation of a watch, but good enough to track watch performance.
Finally, it’s neat to have a simple analog clock set to internet-atomic time.
Great at first - not great over time
Problem 1) If you have lots of watches then it is tricky to see the accuracy score for all of the watches in one list without lots of scrolling. It is not possible to reorder the watches either.
Problem 2) This is the biggest issue. I have been tracking one watch now for about six months. The scale of the time measurement points compresses over time so my 6 months of twice a week time checks have now compressed so much that the accuracy scores are all written over the top of each other and are unreadable - this is the historic scores as well as the most up to date. I could delete the old ones but it is good to see trends.
This app is so nearly perfect but these two problems (particularly #2) really mar the usability.