I recommend everything. Search for all downloadable content on the appstore or google play. This application can be used to record anything. It can customize a notebook and then select some components to make different notebooks. For example, you can keep a diary, keep accounts, record overtime and record fuel consumption. , you can also count data.
If it is used to keep a diary, it can not only add common graphic and rich text editing functions, but also add labels and reminders to the diary. Very powerful, highly recommended.