Does not work for me.

So far it does not work. Goes through a process where it is “Backing Up” my contacts and crashes. Then I skip the back up after it crashes six times… and move straight to merging. It looks for duplicates to merge for a while… and then crashes. I am rather surprised at the high ratings because it is totally worthless for me. I have an iPhone 6+ with the latest version of iOS.

Drew in Utah about Contacts Cleaner ., v6.9.3