A UK EdTech product where a story is personalised with a child's real name and then narrated in a natural voice — a Claude story engine feeding ElevenLabs narration, with a Stripe subscription and a full admin panel behind it.
The constraint nobody puts in the brief: a child under six does not wait. We got median time from story selection to narration start under eight seconds — not by choosing faster models, but by generating ahead of the tap, narrating the first chunk while the rest renders, and caching server-side.
68% free trial to paid conversion, delivered five months from signed proposal to store submission.
