Named for its developer—the National Center for TeleHealth and Technology (hence the two Ts)—this app gives you an easy way to monitor your state of mind over time. You rate yourself on six categories: anxiety, depression, general wellbeing, head injury, post-traumatic stress, and stress. You can also create custom scales to cover pain and other measures of how you’re feeling.
Available free for Apple and Android, T2 also lets you see how daily dramas, medication changes, and other treatments impact your mood. Graphs help you track your emotions over time and help your doctor design the most effective treatment for you.