There is a similar web-based product called myfitnesspal. It asks for users' body stats and fitness goals when they signed up. But due to all the clicks and typing needed to track fitness plans, it's not that easy to use, as compared to a zero UI SMS bot or Alexa skill. That's how my idea came into being, why not enable people to just say their meals to a bot or talk to a bot to record their meals? Besides the convenience of doing that, it would also feel like they are talking to an assistant, which will more likely help them persist through their plans.
Is this a good/useful/informative piece of content to include in the project? Have your say!