Why am I having problems starting or ending my fast?

We have some data validation limits on what can and can't be saved in an effort to make the time tracking as accurate as possible.

Things you CAN do:

1. Set a fasting start time in the past
2. Set a fasting TARGET end time (what you see on the main fasting screen) in the future
3. Save a fasting end time as the current time or prior

Things you CANNOT do:

1. Set a fasting start time in the future
2. Manually add a completed fast with an end time in the future
3. Have a fasting start time come after a fasting end time (this would produce a negative fast length)
4. Have a fasting end time come before a fasting start time (this would produce a negative fast length)
5. Be actively tracking fasts on multiple devices.  This often causes data errors or "ongoing fast already exists" errors

We hope this helps clear up any confusion!