Case: TTFB Mobile 2025Q2

Behavior: first_task_complete Segment: new_users Window: D0–D7 Denominator: all exposed users Assignment: before–after cohort

Baseline completion: 22% Post completion: 36% Δ‑B: +14 pp TTFB: median 4m, p75 7m

Design:

• Inline coach on first run
• Reduced steps from 6 to 3
• Contextual reminder after 2 minutes idle

BSM limiting factor targeted: Abilities Notes: Non-randomized; next test A/B with equal recruitment.