Is there an app that help me tracking change like tracking women's periods? It should let me assign the days when an event happens, and then make a graph so I can see how frequent it is. It's just like tracking period apps, but I have a lot of "periods".
I have a wide range of platform to use: Windows, Linux, web, iOS, Android. It should be free. And I want to support FOSS also, but this is optional.