Retention Rate
Retention rate is the percentage of users who return to an app on a given day after install, with D1, D7, and D30 the most critical benchmarks.
Definition
Retention rate tracks what percentage of users who installed an app on Day 0 are still active on a subsequent day, Day 1 (D1), Day 7 (D7), Day 14 (D14), and Day 30 (D30) are the standard cohort milestones. It's the foundational engagement metric for mobile apps and a primary predictor of LTV.
D1 retention (typically 20–40% for well-optimized apps) measures whether the first session experience was compelling enough to bring users back the next day. D7 retention (typically 10–20%) reflects the durability of early habit formation. D30 retention (3–10%) represents sustained engagement and is the strongest early predictor of long-term LTV.
Retention is significantly influenced by creative accuracy. When ads promise an experience the app doesn't deliver, users install but churn immediately, producing low retention and wasted acquisition spend. Authentic creatives that set accurate expectations tend to produce higher retention cohorts.
Why it matters
Retention is the bridge between acquisition and monetization. High CPI with low retention means you're filling a leaky bucket, spending to acquire users who leave before generating value. Improving D1 retention by even 5 percentage points can increase LTV by 20–30%, effectively making your entire UA spend more productive without changing targeting or creative.
Formula
Retention Rate (Dn) = (Users Active on Day N ÷ Users Acquired on Day 0) × 100
Example
In practice
Two creatives drive similar CPI for a puzzle game, but Creative A acquires users with 42% D1 and 18% D7 retention, while Creative B acquires users with 28% D1 and 9% D7 retention, making Creative A dramatically more valuable despite identical install costs.
Frequently asked questions
What is a good D1 retention rate for a mobile app?
Good D1 retention varies by genre. Casual games: 30–40%. Mid-core games: 35–45%. Utility apps: 25–35%. Subscription apps: 40–60%. Below 20% D1 retention typically signals serious onboarding friction that needs to be fixed before scaling UA.