While this may not be what you’re looking for, it’s worth mentioning that a good ol’ pencil and paper does wonders. It won’t have everything you need, but you can time how long you ran for with a stopwatch, count how many pushups you do, manually measure your pulse, etc. If you’re good with data processing you can stick the data in a spreadsheet and process it to see your progress. The bonus is you’ll learn a lot more about health through doing it yourself. Besides that, I’ve never used a smart watch or fitness tracker. I’ve just exercised until I get tired.