Be aware that it's an Electron app, and as such, not really worth installing. just run it in the browser.

A modern cell phone is just another computer with different underlying hardware. The security is dependent more upon the software & OS, and there can be flaws in those regardless of the hardware. Anything connected to the Internet (or any outside connection, really) is technically a risk. Nothing is ever certain.

I guess that primarily depends on which OS you're using on phone and computer and how you define "safe". I find Windows and Android inherently unsafe. Linux and GrapheneOS, mostly safe.

They removed every mention of it being a fork of cinny after 2.0 rebase