Review on card.io by Jojo Howell

The best thing about this app is that it scans all of your cards in one place, allowing you to keep track of the charges you incur. It also allows me to see my spending history right away, so I can easily adjust my budget. Sometimes it takes several tries to scan the card correctly. If you have multiple cards with different numbers, be prepared for some frustration. This app has been very helpful in keeping track of my spending. I used to spend too much money without realizing it. Now I know exactly how much I'm spending each month and can easily adjust my budget accordingly.