I tried all the popular IF apps, and this is the only one I stuck with. Why? It’s simple, and the Pro Upgrade is a one-and-done payment not a subscription. Very worth the $2.99 upgrade. It’s a tracking clock that is completely editable, a weight tracker, and a few different ways to view your progress, including a graph that superimposes your fasting times on your weight chart, so you can see which fasting schedule works best for your weight loss. The fasting clock lets you view your progress by counting down (time remaining + % complete), counting up (time fasted), or just % complete.
You can set a fasting window, but can edit it on the fly in the main screen, which makes this a truly useful app for those of us who do not stick to rigid fasting windows, plus you can add or edit fasts any time (if you forgot to start or stop the clock).
No social media, no need to be connected to the internet to use, just a simple, well designed fasting app. I’ve been using it for over a year now. Love it!