Step 2: duration and date
How much time went by, and when.
Second step. The chosen category is recalled at the top with its colour, and a link lets you change it without losing the rest.
Three ways to enter a duration

The plus and minus buttons move by five minutes, which covers most cases. The shortcuts below set a duration in one gesture. And the number itself is an input field: for three hours and a quarter, you type the value instead of tapping forty times.
There is no ceiling, a duration simply has to be greater than zero.
The date
The form offers today’s date by default, and you can walk back if there is something to catch up on.