Very useful. Sync can go awry.
I have found this quite useful to track positive habits for the past couple years. About a year ago I noticed that the sync spinner would sometimes hang. I could still enter info, so I thought sync was just slow. It turned out nothing was syncing, and I only resolved this by deleting the app, thereby, losing months of synced data. Oops. Take slow syncs seriously.
D.Cam. about
Chains.cc, v2.5.2