I tried, but it didn't take. The comment deletions were all restored the next day. I haven't asked for the account to be deleted, but I think that still leaves behind all the comment history.
Use one of the scripts that overwrites your comments first. Just deleting doesn't help one bit.
They also rate limit you to one action every 1.5 seconds or something.
What is the app that does that?
There are several ways. If you want to overwrite and delete:
I tried, but it didn't take. The comment deletions were all restored the next day. I haven't asked for the account to be deleted, but I think that still leaves behind all the comment history.
Use one of the scripts that overwrites your comments first. Just deleting doesn't help one bit.
They also rate limit you to one action every 1.5 seconds or something.
What is the app that does that?
There are several ways. If you want to overwrite and delete:
https://greasyfork.org/en/scripts/10905-reddit-overwrite-extended/code (This runs as a script in your browser over a plugin, like Greasy Fork, you install the JavaScript Plugin, add the script code, navigate to your comments and let it work).
For just overwriting without deleting.. haven't found something good yet. I adapted the script above for it and it took a while.
There is also shreddit, but it has more setup: https://github.com/x89/Shreddit