Tap the + button to add an activity.
A list of possible activities is given. Choose one, and it is added to the log with the current time.
Tap on an entry to edit the text of the activity or change the date and time.
The Cog button opens the settings screen.
You can change the list of activities added with the + button.
Add, delete, reorder activities to make the list useful to you.
To print the activity log or send it by email, tap the share button.