It’s not one app but a mix of different things. Alarms to take supplements at meal times, Amazon subscriptions set to the right intervals so I always have oatmeal for my breakfast, supplements before they run out etc., alarms that tell me when to stop eating and start eating again after a 14 hour gap for IF, shopping in bulk at Costco and making sure there is nothing in the house that’s “bad” for me.

I’m not tracking my meals. I did use MyFitnessPal for a bit but I didn’t find it useful.