Here are some apps for a variety of issues dealing with being more at peace. You may find one or more helpful. I like the cognitive ones, even though they are a little work, they help to make you more mindful of your thoughts and actions.
Depression CBT
Angry people
pocket coach
alcohol damage
Breathing to relax
Worry Box
E moods
Anxiety and Panic Attacks
Counseling insite
Cognitive Styles test