Building a great app is only half the work. Generating sustainable revenue requires choosing the right monetization model, implementing it cleanly, and continuously iterating based on data. This guide covers the most effective strategies for Android apps in 2025.

Choosing a Monetization Model

The main models and their best use cases:

• Subscriptions — best for apps that deliver ongoing value: productivity, fitness, media, education.
• One-time purchase (paid app) — works for utility apps with clear, durable value. Declining in discovery but still viable.
• In-app purchases (IAP) — consumables (credits, boosts) for games and social apps; durable unlocks for feature-gated apps.
• Ads — best for free apps with high daily active users. Works alongside IAP (rewarded ads).
• Freemium — free core with paid upgrade. The most common model in 2025.

Play Billing Library 6+

All in-app purchases and subscriptions go through Google Play Billing. Use version 6+ which supports the new subscription model with base plans and offers.

val billingClient = BillingClient.newBuilder(context)
    .setListener { billingResult, purchases ->
        if (billingResult.responseCode == BillingResponseCode.OK) {
            purchases?.forEach { handlePurchase(it) }
        }
    }
    .enablePendingPurchases()
    .build()

billingClient.startConnection(object : BillingClientStateListener {
    override fun onBillingSetupFinished(result: BillingResult) {
        if (result.responseCode == BillingResponseCode.OK) {
            queryProducts()
        }
    }
    override fun onBillingServiceDisconnected() { /* retry */ }
})

Subscription Best Practices

• Offer a free trial of at least 7 days — trials consistently increase conversion.
• Offer annual and monthly plans; price annual at roughly 50–60% of 12 months.
• Use subscription offers (introductory pricing) to win back lapsed users.
• Handle grace period and account hold states — users in grace period should still have access.

Advertising

• AdMob — Google's ad network. Easy to integrate, good fill rates.
• Rewarded ads — users watch an ad in exchange for a reward (extra lives, coins, premium feature). Highest eCPM and best user satisfaction among ad formats.
• Interstitial and banner ads — use sparingly. Overuse is the leading cause of negative reviews.

// Rewarded ad example
RewardedAd.load(context, "ad-unit-id",
    AdRequest.Builder().build(),
    object : RewardedAdLoadCallback() {
        override fun onAdLoaded(ad: RewardedAd) {
            ad.show(activity) { reward ->
                grantReward(reward.amount)
            }
        }
    }
)

Analytics and Iteration

• Track conversion funnel: install → registration → first value moment → paywall view → purchase.
• Use A/B testing (Firebase Remote Config) to test paywall copy, pricing, and feature gates.
• Monitor churn rate for subscriptions — a churn above 5% monthly signals a value or UX problem.
• Track LTV (Lifetime Value) by cohort, not just total revenue.