Your reply reeks of scam even though you said public key.
Not sure what your angle is but you’re completely wrong.
Discussion
That’s how I save mine. I am also in Damus. If you have better option please share.
Pen, pencil
Notepad and copy paste. Not the least bit complicated.
You don’t write to avoid missing a character but make sure you copied the complete address
Download Bitwarden then copy and paste your public key at the note option! Just try. It’s not a scam. You can save all your notes.
You must be aware of Bitwarden. By the way I am using an Iphone but can also be downloaded to any android. 
Hello fren. Sorry for the wrong info. Instead of public key save your “private key” in your Bitwarden wallet. All your important notes can be saved.
Yo, just wanted to chime in here, best practice would be to never store your private keys in a password manager. ✌️
Pen & paper is great, metal etching is better!
💯
Never store your private key in a password manager
I wonder if it gets saved in an iPhone backup? 🤔
It does! Even with 1Password which is imo the best. They auto backup to iCloud. On top of that, outside of 1Pass, uncertain how other pw managers store their data. Iirc there was a recent issue with a LastPass breach where apparently they had passwords stored in plain text lol.