I'm building FitBee (https://apple.co/4aGUw5X) - a simple and user friendly alternative to MyFitnessPal. It's been really fun trying to figure out how to build the most frictionless food tracking app possible. I just launched a feature where you can get a calorie & macro estimate by taking a photo of your meal and am working on several improvements to it.
I have a small amount of experience building iOS apps but have never done anything with a backend before. This project is fairly backend heavy, so it's been quite a journey learning how to do everything from setting up a database to deciphering elasticsearch.