Simple symptom tracking app

I’m having these events and trying to find the cause with my doctor. I’m looking for a tracking app meant for symptoms and tracking of these types of events. I want to see if there is any triggers with my episodes, if it happens more at certain times, how often they happen, and what symptoms are different between each episode, and which times are the same. Maybe even how long they last, now THAT would be awesome.

The more affordable the better as these episodes actually prohibit me from working, but I get it if it comes with a subscription, just include that in the suggestion of app if you can so I’m not blindsided. If it’s good I’ll still use it probably. I just don’t like investing and signing up and seeing a $90 annual fee, ya know?

Thank you so much!