As long-time readers and/or Apple Watch users know, the Apple Watch encourages wearers to be more active by issuing monthly activity challenges. While these challenges can be motivating, I’ve repeatedly found the Apple Watch to be bad at the math required to track them. I first noted this in November of 2017, and then saw it again in February of 2018.

It’s been 18 months since I last noticed such an issue, however, so I assumed that the problems had been fixed and the math was being correctly computed. Yet, like the living dead, these bugs just won’t stay down. Here is my October challenge:

This challenge calls for 2560 Exercise minutes in the month of October, and then states that that’s about 79 minutes a day. I found the use of the word “about” alongside a not-at-all-round number like 79 to be rather strange. I guessed that meant I’d need a bit more than 78 minutes a day, and checked the math.

In what universe is more than 82 and 1/2 “about 79”? If the claim was “about 80”, that would still be rather wrong. Even “about 82” would be problematic, because it would leave you 18 minutes short of the goal at the end of October. But “about 79”? I can only conclude that the Apple Watch has fallen right off the wagon again.