Description of the bug
I’m very frustrated with what happened to me. I have by mistake changed a card and clicked on finished editing. After that I saw I have edited the wrong card. I want to cmd+z but it didn’t work.
There is any way to get the history of the card, I get back my old text???
Hi @ivomota,
While we do store your edit history, it’s not currently accessible in a way to rollback between editing sessions but a Version History is something we hope to add support for in the future – I’ve added your +1 for this.
In the meantime, if you have Supernotes synced to multiple devices. You can take the other device offline, open Supernotes and you’re previous version of the card should be there – simple copy the content into a new card, go back online and it will sync up.
For urgent requests like this please use the in-app messenger (“Chat with Us” in the Help menu). While I understand this is frustrating it’s technically not a bug, so I’ve moved this to community support 
I was able to recover my text using my iPhone offline.
Not a good thing, that. 
Ok, next time I will use the chat. Sorry about that.
No worries, that’s what we’re here for Ivo! Glad to hear you managed to recover the text.