Set Reminders in Calendar
Not only recording the past, but also planning the future, i.e. plan tasks and set reminders to start. Later compare with the planned tasks.
I dont think Google calendar is an option. Alone for the privacy.
Gcal? Why use other applications?
But this option is best to compare planned vs happened.
Emmanuel Smith (mraxilus) commented
A better option would be to have Google calendar integration. To compare planned vs. actual.
Couldn't you use your calendar for future planning? Gcal gives reminders.