The app can be used to track whatever aspects of your health are relevant to you. You can define your own “events” (e.g. exercising, taking a medication, or experiencing a particular symptom) and “levels” (e.g. energy level, pain level, mood, etc). Whenever an event occurs or a level changes, you just tap a button and the app records the timestamp. The app also lets you log the food you eat and track different hypotheses about your health. You can view the data in a web dashboard or export to CSV format.
Like many people here I have tried various approaches to tracking my own health data. This app is based on my experience of what works and what doesn’t. I wrote an FAQ here.
The app is free for casual use; unlimited use requires a subscription. The app is designed with privacy in mind and you have the option to keep all data stored locally on your device.
Happy to take feedback and questions!