I've been consistently pushing updates to my intermittent fasting & mindful eating companion app - https://www.fastpause.app/ - offline first PWA with no tracking.

It helped me stay more consistent with IF - added visual indicator of previous fasts in a little calendar widget on the dashboard so every time I open it, I see my streak visually, which has been a great motivator to continue.

I also added a BMI calculator, as the NHS one I had to enter all my values from scratch each time I went, so got a bit annoyed :)

I think I'm still the only user, but it's given me a lot of value as I beat my plateau!