The app works perfectly. Read the instructions. – Tweet Cleaner - Delete Tweets Review

This app is great and works perfectly. I'm not sure why people are having issues, but I've seen the errors and you fix them by doing two simple things; making sure your iOS and Twitter app are up-to-date and running the current versions, and also that you tell Twitter to allow access from the apps to access your Twitter account, which you do in your Twitter settings on our iPhone settings menu. It will give you errors if you don't allow access the app to access Twitter in the settings menu. It has worked perfectly with iOS 7.x on my iPhone 5 since I bought it months ago and I'm an I.T. guy. It works.
Review by MindfulWanderer on Tweet Cleaner - Delete Tweets.