Does a real vocabulary exercise in frame two improve understanding and qualified downloads?
- Audience
- Eligible US English iPhone default-page visitors, with research covering beginners in Latin and non-Latin scripts.
- Control
- The captured sequence after verifying availability and replacing any unsubstantiated mastery claim consistently in both variants.
- Treatment
- Replace only the competition-results second frame with one authentic vocabulary exercise and feedback example. Keep the other assets, metadata and offers fixed.
- Method
- Validate the exercise with a language specialist, then check comprehension and run eligible randomized App Store product page optimization.
- Primary measure
- Platform-reported download conversion for eligible randomized visitors; record exercise comprehension separately.
- Guardrails
- People should identify vocabulary practice without assuming guaranteed fluency, mandatory competition or historical free-session limits. Do not infer learning gains from downloads.
- Decision rule
- Set the useful effect, sample requirement and analysis date from actual baseline traffic before launch. Keep control if inconclusive or if improved conversion depends on inflated learning expectations.
- What could muddy the result
- Language-course changes, school calendars, subscription offers, brand traffic and target-language mix may change the result.