Feature rich workout app for Android?

Like the title says, a good feature rich workout tracker for Android with a nice and clean ui that also is privacy respecting.

What have you considered or looked at already?
Many libre workout apps, writing on journals etc.

In brief, tell us about your privacy threat model?
I hate Big tech, but I’m not hiding from the government or something. On a scale of 1-10, it’s a 4.

Are you looking for a nutrition tracker? Or something to track actual exercises? If the answer is both I don’t think you’re gonna find what you’re looking for.

Yeah, something to track exercises. Most foss apps I have looked through don’t do much features like workout creator/planner etc.

Would a notepad suffice? Or maybe you want a structured app that says the time of the exercise then counts down until reps are done?