When comparing WorldCard vs CircleBack, the Slant community recommends WorldCard for most people. In the question“What are the best iOS apps for scanning business cards?” WorldCard is ranked 7th while CircleBack is ranked 13th. The most important reason people chose WorldCard is:
You can share and backup your contacts in Dropbox and Evernote.
Ranked in these QuestionsQuestion Ranking
Pros
Pro Dropbox and Evernote integration
You can share and backup your contacts in Dropbox and Evernote.
Pro Batch scanning
You can take multiple pictures in a row and processes them all together. Although, sometimes the UI might be a bit clunky and prevent from it as you would like.
Pro Good OCR
WorldCard offers one of the better OCR results.
Pro Free to use
CircleBack is completely free to use and ad-less.
Pro Captures contacts from email accounts
Cons
Con Slightly unintuitive UI
Some of the navigation and option choices can be a bit confusing, but not indecipherable.
Con Lacks Salesforce integration
Con Randomly merges multiple contacts
Con Contact merging can be hit or miss
There may be times when CircleBack over-merges contacts. Luckily it backs up your contacts fairly often so this is easily corrected but might be a headache for people with larger address books.