It can be tough to find an app that has actually been part of a research study and has been shown to work.
It is based on a concept called Attention Bias Modification Treatment. People who are anxious tend to lean toward seeing a situation as scary or negative. The treatment uses different techniques to retrain the brain to be less biased toward negative thinking.
The Personal Zen game helps you practice this skill by focusing on a positive looking face instead of a negative looking one.
It is available for free on Android and iOS so if you check it out, please let us know what you think! It is best used on a regular basis especially when you are actually feeling anxious (versus just in a regular mood). Enjoy!