[hu3]

Often I need to consult notes on my phone, is there an app to comfortably browse and search notes in phone?

Preferably offline with syncing.

Today I use Joplin but it has custom file format.

[nevf]

Clibu Notes is a note-taking and Personal Knowledge Management (PKM) app that works on desktop, tablet, and smartphone. Local first, fast with first class editing, backlinks etc. Simple, effective note taking, always accessible everywhere. See Clibu.com

[bgood456]

I like markor

[khimaros]

and git synchronization with MGit on Android