Solidly performing data tracker.
This app does a fine job of allowing you to track whatever data you wish on your own schedule. If you need an app that tells you what to track, this is not what you are looking for. If you want to choose for yourself, then you will like it. I would like to have a little more control over the plots, but the plots are basically fine.
Geometrician about
Symptom Tracker by TracknShare, v6.4.3