# Hypothesis — mobile improvements lift retention

- **Statement:** Improving the mobile experience will raise 30-day retention for mobile-primary
  users by ≥ 5 points.
- **Status:** open
- **Opened:** 2026-01-20

## Evidence for
- Mobile NPS 6.2 vs web 8.1 — clear experience gap. `[data]`
- Top churn-survey complaint is "app feels slow." `[interview]`

## Evidence against
- None yet.

## How we'll know
- 30-day retention for mobile-primary cohort, measured one quarter after the mobile release.

## Reopen / resolve when
- The post-release cohort lands → mark validated or invalidated and log a decision.
