CBTReferee [iTunes Link] $4.99US, was written by Andrew Arrow to assist in his personal therapist-directed CBT. Finding himself always needing to carry around a notebook, since negative thoughts and feelings happen at random, he built quite a simple app for his own use. Finding it personally effective, he decided to put it in the app store, not really knowing if it would be useful for others. Feedback he received convinced him otherwise.
The app contains a brief description of CBT and clear instruction on how to properly utilize the app. It's just enough information to get started, and doesn't bog down in theory, so you can get up to speed quickly.
When a negative thought occurs, the app directs you to write it down immediately. Once done, tapping the next button takes you through a screen of ten potential fallacies inherent in your entry. Some of these include: Nothing or All (black and white thinking where one small flaw kills an entire concept), Conclusion Jumping (assuming facts that don't' exist), Emotions as Evidence (assuming that if you feel a certain way, it must be true), and many others.
With the journaled text visible, scroll through the list and check any of the options that you think may apply to your statement. Next, you are presented with a type-in screen titled:
Referee Says, where, based on your statement and the options you have chosen, you try to write as objective an assessment as possible, to negate the statement.