I don’t think it will be easy because tachiyomi is open source

Standardnotes and Notesnook also good as well and they provide web app

hnA only provide redirect link to many file hosting sites. I wish someone can create new site that recreate those link too smilar like nyaa from .eu to .si.

I still touch MP3 because it is compact and we need everything to be stored locally.

well, if nobody in your circle and it is mandatory for your job. you have to suck it up to use this app.

Alexandrite for desktop and Voyager for iOS & Android is nice combo