Why CPI alone is incomplete
CPI explains the cost of an install, not its commercial quality. A useful scorecard connects CTR and IPM with store conversion, tutorial completion, D1/D7/D30 retention, sessions per user, ARPDAU, LTV and ROAS.
CTRIPMD1–D30LTV / ROAS
The diagnostic sequence
- If CTR is weak, improve the creative hook.
- If IPM is weak, align the ad promise and store page.
- If tutorial completion is weak, simplify the first session.
- If retention falls, inspect difficulty, content cadence and performance.
- If engagement is healthy but ROAS is weak, improve monetization without damaging play.

