Yes, Tally is a legitimate financial services company registered with NMLS Consumer Access. As for security, the app doesn’t store your bank usernames or passwords, and information is transferred using SSL encryption. Tally will not share any data without permission. Tally has more than 17,000 reviews in the Apple App Store, many with a rating of 4.5 stars. Most reviews are positive, with several commenters saying it’s helped them better manage their debt. People do, however, complain about the stringent credit score requirement. Other users say there are sometimes problems keeping credit cards linked up to the app.