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Family, School & ParentingGenerated accuracy model review: 2026-05-06

Screen Time Calculator accuracy and testing

This page documents how Calwarden builds trust for this calculator: source notes, regression-style default tests, limitations, assumptions, unit handling, rounding, and visible change history.

Formula source

  • Average daily screen time = (weekday minutes x 5 + weekend minutes x 2) / 7. Minutes vs target = average daily minutes - target daily minutes.

Test cases

Default input regression check

Generated from the checked-in default inputs and calculate function.

Inputs

  • Weekday Screen Time: 45 min/day
  • Weekend Screen Time: 90 min/day
  • Target Daily Average: 60 min/day

Expected outputs

  • Average Daily Screen Time: 57.9 min/day
  • Weekly Screen Time: 405 min
  • Minutes vs Target: -2.1 min/day

Known limitations

  • Screen time results are planning aids only and are not medical, developmental, educational, or professional advice.

Assumptions

  • All values are user-entered and the calculation is deterministic.
  • The calculator runs locally in the browser and does not store family, child, schedule, or household data.
  • Screen time results are planning aids only and are not medical, developmental, educational, or professional advice.

Unit handling

  • Weekday Screen Time accepts values in min/day.
  • Weekend Screen Time accepts values in min/day.
  • Target Daily Average accepts values in min/day.
  • Average Daily Screen Time is displayed in min/day.
  • Weekly Screen Time is displayed in min.
  • Minutes vs Target is displayed in min/day.

Rounding rules

  • Number displays use up to 2 decimal places in the calculator UI.
  • Input precision follows configured step values where provided.

Version history

1.0.0 - 2026-05-06

Generated accuracy and testing page from the current screen-time-calculator calculator definition.

Change log

2026-05-06

Published default regression test documentation and metadata fallbacks for Screen Time Calculator.

Calculator transparency

Accuracy pages are generated from checked-in calculator definitions and can be upgraded with curated review metadata over time.

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