Calculation of exercise duration

[Paedra]

My Fitbit says that I managed to ride a spin bike for 655 months yesterday in the late morning. I’m interested in how it made the calculation. Previous readings have been more in line with my own estimates. I work it out by subtracting the start time from the end time. 

[magnetix]

@Paedra Your spin bike ride of 655 months was a little slow. I ran my 2 kilometers last July a bit faster. We're still waiting for a fix... There used to be hours:minutes:seconds before the update.

Quite a few data converted this way since the 4.24 update.

[Paedra]

I’ll try harder. Thanks.