We have this app that we spent weeks developing as a v1 for our use-case. One late night, we got a few of the apps we have in our account mixed up and were cleaning out the "test" apps. We ended up deleting (permanently) the main app we had developed. Is there a way we can get this app back from the backend? Retool team, can you help us get our app back please!?
Thanks for reaching out, @pratikatlanta! Welcome to the community. 
Can you confirm that the app in question is no longer in the Trash tab of your org's home page?
If it has been fully deleted, I'm afraid there's not really anything that I can do to help!