Looking for a fitness journal/walking tracker with data I can show to my GP.

So to cut a long story short, I have been unable to stand for long period of time or walk long distances for most of my life due to a congenital development issue with my feet. I finished my last round of surgeries around 3 months ago and now that it's all fully healed I've felt a massive improvement. I want to be able to track my progress and be able to show it to my GP at my checkups as they have recommended keeping an activity journal. I've found that the generic step-counter apps are a bit crap/unreliable. They only show total steps which seem to vary wildly between apps. What can you recommend for this? I was considering Wanderer, but that seems like it's more for planning routes or saving locations to visit at later dates. Ideally I'd like it to have these features. Must have a mobile companion app. Ability to start/stop/pause walks when needed Distance walked (in meters/miles) Time spent walking Elevation (up and down) - would be a nice-to-have, but not essential Ability to add personal notes following each walk.