I've been using onX for years to keep track of places that I've visited, parking access points that I find through both online and on the ground research, special regulation stretches, downloaded maps for online use, places where I've found success, properly boundaries, landowner data etc.
In 2022, I'm making it a point to drop an onX pin every time I fish. Pins will include photos and descriptions of fish, weather conditions, water levels, and temperatures, flies that worked, etc. I've been on the water 9 times this year and have already found it helpful to review conditions and results from my outings. I'm certain that a few months or even years worth of data will be an unbelievable tool. However, all of this is private, and although you do have the ability to share a pin with other onX users, that is entirely optional and something that you need to do on purpose.
onX is not a social network for hunters and anglers like FishBrain nor is it a tool to open and find prepopulated fishing locations like TroutRoutes. It would be best to think of onX as a private journal for documenting places that you want to fish or places that you have fished.
These types of apps give me a little bit of anxiety due to the potential of them disappearing or dropping support over the years, but onX is an industry-standard for scouting in the hunting world with a growing team of professionals and a continuous stream of new features. I promise I'm not sponsored by them! If you're looking for a digital tool to keep track of your outings, I think it's worth a look.