I have been a beta tester in March 2020. They have come a long way since then and built some interesting and compelling features. It used to be an app that calculated your caloric need for the ride and plot it along the route you uploaded to “optimize” the timing of when you should eat. For example not on an extended steep and twisty downhill (obviously).
My takeaway back then after using the app for the whole summer of 2020 was to just eat every 30 min 30-40g of carbs. I didn’t do so many all day rides that it was worth the subscription at the time to me. I don’t eat on rides <2h and for long rides you just have to eat enough. Three weeks ago I signed up again for 20$/year to give it another shot and see what they’ve built on top of what they had 3 years ago. Haven’t used it yet tbh…