There seems to be a lot of shade here and I wanted to offer a different perspective. I've strength training for over 10 years and aside from the basics like nutrition, rest, form, etc... one of the most valuable tools I use are progression spreadsheets like this one: https://docs.google.com/spreadsheets/d/1VYNuMhonQw1SOKO_7IbG...
The main value is that it not only tells you what exercises to do, but also how much more to lift each day to ensure steady growth. They are designed by well-informed people with a lot of experience in the field. However, there are some major flaws (e.g Most are just linear increases, they don't handle plateaus/failures well, they aren't personalized, exercises don't change, and the UI is pretty bad).
There's a lot of potential in something like fitnessai to address these issues. Obviously, it's not going to do everything for you and won't replace your own research and experimentation, but I can see it being super valuable as a tool in the gym.
@jakemor the app looks dope. Listen to your customers and keep building it out. The majority of HN may not your ideal customer but don't let that deter you.