The United States is the largest single-country mobile app market in the world. US consumers spent nearly 60 billion USD on mobile apps in 2025, according to Sensor Tower's State of Mobile report. For app developers looking to grow through affiliate marketing, the US market offers the biggest revenue pool, but also the highest user acquisition costs. Affiliate programmes offer a performance-based alternative that shifts spending from upfront ad budgets to commissions paid only on confirmed sales.
US Mobile App Market Size and Growth
The US mobile application market was valued at 80.92 billion USD in 2025, according to Mordor Intelligence, with projections showing growth at an 11.83 percent compound annual growth rate to reach 141.54 billion USD by 2030. Sensor Tower reported that global in-app purchase and paid app revenue reached 167 billion USD in 2025, a 10.6 percent year-over-year increase, with the US accounting for the largest share of that spend.
Non-gaming apps surpassed games in in-app purchase revenue for the first time in 2025, with non-game categories climbing 21 percent year-over-year (Sensor Tower, 2026). This shift reflects growing consumer willingness to pay for productivity, health, education, and AI-powered tools, all categories well suited to affiliate-driven growth.
Approximately 85 percent of the US population owns a smartphone, and the average American spends 3.6 hours per day in mobile apps (Sensor Tower, 2025).
CPI Benchmarks and the Case for Performance-Based Models
The cost of acquiring a mobile app user through paid advertising in the US is among the highest globally. Apple Search Ads show an average cost per install of 4.06 USD across all categories, according to AppTweak's 2025 benchmarks. Category-specific CPIs are significantly higher: sports apps average 26.81 USD, games average 12.28 USD, finance apps average 8.23 USD, and shopping apps average 6.20 USD.
For iOS specifically, North American markets command premium CPIs of 4.50 to 6.00 USD for competitive categories. Android CPIs are generally lower, averaging around 3.70 USD per install.
These costs represent upfront spending with no guarantee of return. If a user installs but never subscribes, the CPI is a loss. Affiliate marketing inverts this model. With Insert Affiliate, you pay cash commissions via Stripe only when a referred user completes a purchase or subscription. You can set flat-fee or revenue-share commission structures, paying affiliates a fixed amount per conversion or a percentage of each transaction.
Apple App Store Fee Structure
Apple charges a standard 30 percent commission on all in-app purchases and subscriptions during the first year. After a subscriber has been active for 12 consecutive months, the rate drops to 15 percent for that subscriber.
The App Store Small Business Program reduces the commission to 15 percent from day one for developers earning up to 1 million USD in annual proceeds. Eligibility requires that the developer and all associated accounts earned no more than 1 million USD in the previous calendar year.
In the EU, developers on the alternative terms within the Small Business Program receive a further reduced commission of 10 percent.
Insert Affiliate allows you to account for these platform fees in your commission calculations. You can enable platform fee deduction in your dashboard settings so that affiliate commissions are calculated on the net amount after the Apple commission is subtracted, protecting your margins.
Google Play Store Fee Structure
Google Play applies a 15 percent service fee on the first 1 million USD in annual earnings per developer account. Once the developer exceeds that threshold, the standard 30 percent rate applies to additional revenue. This threshold resets each calendar year.
Starting June 30, 2026, Google is rolling out further reductions in the US, UK, and EEA. Subscription service fees will drop to 10 percent, and developers in specific programmes can access a 15 percent rate on new installs or a 20 percent rate on existing installs for non-recurring purchases.
As with Apple, Insert Affiliate lets you configure these rates in your dashboard so that commission calculations reflect your actual platform costs.
The External Payment Link Opportunity
A significant development for US app developers is the evolving legal landscape around external payment links. Following the Epic v. Apple litigation, a US court ruling in April 2025 found Apple in violation of the original 2021 injunction and stopped the company from collecting its previously announced 27 percent fee on purchases made through external links. As of early 2026, Apple charges zero percent commission on linked-out purchases while the district court determines what rate, if any, is permissible.
This creates a substantial opportunity for developers who can direct users to web-based checkout flows. Insert Affiliate supports web transaction tracking through Stripe Connect and RevenueCat Web Billing, meaning affiliates can be credited for conversions that happen outside the app stores entirely. If the external payment link fee remains low or at zero, developers could save significantly on platform commissions while still running a fully tracked affiliate programme.
Launching an Affiliate Programme for the US Market
To start an affiliate programme targeting US users with Insert Affiliate, the setup follows a straightforward path. First, integrate one of the supported subscription platforms such as RevenueCat or Adapty. Second, install the Insert Affiliate SDK in your app to capture affiliate identifiers via deep links or short codes. Third, configure webhook connections so that purchase events flow to Insert Affiliate for commission tracking. Fourth, set your commission structure, choosing between flat-fee and revenue-share models, with optional platform fee deduction.
Affiliates sign up through Insert Affiliate's signup page, not inside your app. Once approved, they receive unique affiliate links. Every purchase made by a user they refer is tracked, and commissions are paid out in cash via Stripe.
Commission Strategy for US Market Pricing
US app prices tend to be higher than global averages, particularly for productivity and business tools. When structuring commissions, consider that a 10 percent revenue share on a 9.99 USD monthly subscription yields roughly 1.00 USD per month per subscriber in affiliate payouts before platform fee deductions. For annual subscriptions at 49.99 USD, the same rate yields approximately 5.00 USD per conversion.
Insert Affiliate supports advanced commission rules that increase rates as affiliates hit sales targets, as well as daisy chain commissions that reward affiliates who recruit other affiliates. These tools let you build tiered programmes that match the scale of the US market.
Key Takeaways
The US is the world's highest-revenue app market with nearly 60 billion USD in consumer spending in 2025, but also the most expensive for paid user acquisition. Affiliate marketing offers a performance-based alternative where you pay only for confirmed conversions. With evolving platform fee structures and the external payment link opportunity, the economics of affiliate-driven growth in the US market are increasingly favourable for subscription app developers.