Estimates are fine. Nobody is checking, and rounding up is more honest than most people manage.
On a normal day, how much screen time?
How many times a day do you pick up your phone?
How soon after waking do you check it?
When do you stop looking at screens at night?
When are you most on your devices?
Which of these give you the most trouble?
What have you already tried?
7 unanswered on this step — you can continue anyway, it just makes the result less certain.
Step 2 of 6