How to compare screen time from two weeks
Keep the device, apps and reporting scope consistent. Then pair Monday with Monday, Tuesday with Tuesday and so on. A day counts only when both weeks have a recorded value.
The example, worked through
Week A has seven days at 300 minutes: 2,100 minutes total. Week B has three recorded days at 240 minutes: 720 minutes so far. Comparing those raw totals exaggerates the difference. On the three matching days, the totals are 900 and 720 minutes, a 20% decrease. The matched daily averages are 300 and 240 minutes.
Why blanks and zeros are different
A blank means there is no complete entry. A zero is a real value and stays in the calculation. Missing pairs are excluded, not estimated. If Week A has zero minutes in all matched pairs, a percentage change cannot be computed; the minute difference still can.
Try it with a class
Which days count? A printable screen-time worksheet gives learners two fictional logs to compare, with a separate answer key. It takes about ten minutes and requires no personal screen-time records.
Turn the observation into one decision
Choose an allowance that fits your actual needs. Keep work, navigation and intentional use in context. A lower number is not automatically a better day, and this comparison is not a health assessment.
