I enjoy all the extra features other similar apps don’t seem to have, such as: calories spent and weight/height. I was using a different app before, but they changed it and I couldn’t select specific fasting times anymore. I want to be able to fast for 21 hours and 13 min if I please and this keeps track of that (esp if i choose to end a fast early or prolong it).
Probably should take ‘calories spent’ with a grain of salt, since it doesn’t account for exercise, but it still gives you an idea. I didn’t know i’d spend around 1300 kcal if I fasted for 22hrs, but it makes sense if you calculate how many calories you need for maintenance. Esp useful if you fast for multiple days, it just adds it up for you.
All in all, just very convenient and easy to use.