Is this story right for the kid?
Paste an AI-generated story — or any story you're thinking of reading aloud — and a target age. The tool measures sentence length, Beck Tier-2 vocabulary load, and late-acquiring sounds, then shows you the numbers underneath the verdict.
Average sentence length against age-typical norms, Beck Tier-2 vocabulary count, and late-acquiring phonemes that fall above the target age in Crowe & McLeod (2020).
It doesn't read for meaning, theme, cultural fit, or trauma triggers. A short-sentenced story can still be wrong for a child; a long-sentenced story can still be right. The verdict is a heuristic, not a recommendation.
An LLM that just wrote the story will tell you the story is fine for the age — it has no incentive to disagree with itself. This tool counts the words. The contrast is the point.
Sources. Acquisition ages: Crowe & McLeod (2020). Vocabulary tiers: Beck, McKeown & Kucan (2002). Related reading: Reading LLM writing · Common antipatterns.