Monetization without measurement is gambling. Before you spend a dollar on user acquisition, you need to know what a player is worth and what they cost. These metrics are the language of a profitable game.
The metrics that matter
- LTV (Lifetime Value): total revenue an average player generates over their lifetime.
- ARPU (Average Revenue Per User): revenue divided by all active users.
- ARPPU (Average Revenue Per Paying User): revenue divided by paying users only.
- CPI (Cost Per Install): what you pay to acquire one new player.
- Retention (D1/D7/D30): the share of players still active after 1, 7, and 30 days.
The one rule of profitability
Everything reduces to a single inequality: LTV > CPI. If a player is worth more than they cost to acquire, you can scale profitably. If not, every install loses money. This is the heartbeat of a mobile business.
Retention is the multiplier
LTV is built on retention. A player who churns on day one contributes almost nothing, no matter how clever your store is. This is why experienced studios fix retention before optimizing monetization — a leaky bucket cannot be filled.
Reading the funnel
The funnel above shows why mobile economics are brutal yet workable: only a sliver of installs ever pay, and a fraction of those become high-value "whales." Your job is to widen each stage — better onboarding lifts D1, better content lifts D7, better offers lift conversion.
Retention buys you time. Monetization turns that time into revenue. You need both, in that order.
Cohorts over averages
Never trust a single blended number. Analyze players in cohorts — grouped by install date or acquisition source — so you can see whether last month’s update actually improved LTV. Averages hide the truth; cohorts reveal it.
Start with five metrics: D1, D7, ARPU, CPI, and LTV. Master them, and every other decision becomes clearer.
