Truebill automatically categorizes your transactions into our predefined categories. Our algorithms are constantly improving but are not perfect.
If you see a transaction in the wrong category, simply tap the category icon on that transaction to change it. You can check the box at the top of the "choose category" panel to apply your change to other transactions with the same name.
TIP: The easiest way to find and fix categorization mistakes is to look at a monthly view of your Spending report. The pie chart there gives you a quick representation of spend, and if a category appears too big, you can tap the icon to quickly see all of those transactions, making it easy to find the transaction that may be throwing things off.