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I was looking for something similar a while back. This one looked promising, could you try it and see how it goes?
Pain Diary (PFA) ((SECUSO) Record condition, intensity, location, nature and time of your pain.)
https://f-droid.org/packages/org.secuso.privacyfriendlypaindiary/
Medication and exercise might need to be separate from this
This is pretty slick, thank you for sharing the link!
Hi, I am a building a platform with the goal of supporting apps like this, and I would be interested to develop a plugin for your use-case as an experiment (no fee).
I am working alone on this and this is not my first priority, so I cannot make any guarantees about the timeline, or the scope of the plugin. But, if you are interested we can have a chat on matrix.
The project is not open source yet, but I am planning on doing so once (a) I figure out how to properly apply licensing, and (b) remove any potentially critical information (credentials) from the repository.
I'd be interested in this as well, and would love to help test if you would like.
So at first I thought you meant something else, but what I misunderstood is still really interesting.
An app where you can just list your symptoms and how they change over time and then gives you a percentage chance that you may have any given condition. Kinda like... "My back hurts, it's been hurting for a week and getting worse, my skin feels dry, had a headache three days ago..." and the app tells you you might have some this-or-that infection.
I don't know how doable this is at all.
Sorry but I don't know about your particular issue... I would recommend just using Sheets? I mean, based on what you're saying you just want something where you can easily input a number (pain level) or symbol (took meds/didn't take meds) over time on a few different axis and get a visual representation (graph). Why not just use Sheets?