Writing as a therapy.
Searched for a journaling app for some time and found this. Although it was a paid app it felt like a good investment at that time. One year got over and i almost wrote for 150 days and looking back i improved a lot in terms of expressing ideas and introspection. This is a small investment in the long run. I tried it in different ways for keeping my ideas and expenses. It was most useful as a diary to keep track of good moments. I have bought an iPad, the experience of writing it in iPad is way more good than iPhone with additional features. In short it made writing fun and became a very good tool on a daily basis.
Sam-kit about
Day One Journal: Private Diary, v2.3.4