I use μlogger on my phone and i set up the server: https://github.com/bfabiszewski/ulogger-server

Freshrss as well and Feedme on android. Feedme is nice since it can download everything, even webpages and images for offline reading

https://github.com/kieraneglin/pinchflat

ulogger client is not cross platform (android,fdroid) for the logger but it can logg to any webserver you are in control of to ulogger-server : https://github.com/bfabiszewski/ulogger-server

I installed it from fdroid, is there a difference between play store and fdroid version?

Tasks.org on f-droid is great for this kind of use.