Retention rate measures the percentage of users who return to an app on a specific day after install, with D1, D7, and D30 retention being the most critical benchmarks.
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.
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.
Example
“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.”
LTV is the total net revenue a user is expected to generate over the full course of their relationship with your app, used to determine how much you can profitably spend to acquire them.
Learn moreMobile User AcquisitionDAU is the number of unique users who open and engage with an app on any given day, a primary metric for measuring app health and engagement.
Learn moreMobile User AcquisitionCPA measures the average cost to acquire a user who completes a specific in-app action, providing a deeper efficiency metric than CPI.
Learn moreMobile User AcquisitionROAS measures revenue generated for every dollar spent on advertising, serving as the primary efficiency metric for paid user acquisition.
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