Unit Economics for Subscription Apps
Every UA decision rolls up to one question: do the unit economics work? How CAC, LTV, payback and margin combine into a business that scales, or does not.
Key takeaways
- Unit economics is the per-user math: LTV minus CAC, with payback and margin.
- Healthy UA means LTV comfortably exceeds CAC and payback fits your cash.
- Fix the economics before scaling spend, or you simply scale losses.
Strip away the dashboards and UA comes down to one question per user: are they worth more than they cost to acquire? Unit economics is that question made precise, and it decides whether growth builds a business or burns one.
The core equation
At its simplest, a healthy app earns more in lifetime value than it spends to acquire and serve a user, and recovers that cost fast enough to keep going. LTV, CAC, margin and payback are the four numbers in that sentence.
Where each lever lives
CAC is set by your UA: channels, creative and efficiency. LTV is set by retention and monetization: onboarding, the paywall, pricing and churn. Improving either side widens the gap you can profitably scale into.
Why you fix this before scaling
Scaling spend multiplies whatever economics you already have. If the per-user math is negative, more budget just loses money faster. Get the unit economics right first; scale is an amplifier, not a fix.
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