Global app marketing spend soared to $109 billion in 2025, with user acquisition ($78B) and remarketing ($31B) both growing strongly. Imagine your Head of UA just asked why cost per install climbed 30% this quarter while installs stayed flat. You check the dashboard. Google App Campaigns, Meta, and Apple Search Ads: all saw costs rise and efficiency fall. That’s the reality for most mobile marketing teams right now, and it’s why the conversation about user acquisition channels has shifted from “which platform performs best” to “how many channels do we actually need.”
In 2026, a healthy user acquisition channel mix rarely means picking one winner. It means running paid search, social, and app store channels alongside newer inventory sources that don’t compete for the same auction. Here’s what has changed this year, and what UA managers should test before their next planning cycle.
Key takeaways
- The “Big 4” (Google, Meta, Apple, and ad networks still drive volume, but rising CPIs and shrinking incrementality mean most teams need at least one channel outside that group.
- Google deprecated Privacy Sandbox on Android in October 2025, so measurement uncertainty wasn’t resolved as the industry expected. App Tracking Transparency on iOS continues the bigger, more permanent shift.
- Mobile OEM inventory, on-device placements sold directly by manufacturers like Samsung, Xiaomi, vivo, Huawei, HONOR, Transsion, and OPPO, has become a real acquisition channel, not a niche experiment.
- Testing a new channel works best with a small, ring-fenced budget and a short window (1-2 weeks) to see directional signal before committing more spend. Use clear criteria for what counts as a signal before you scale.
- Emerging markets (India, Indonesia, Brazil) reward UA teams that diversify early, since Android device distribution there favors OEM and app store channels over Google-first strategies.
What Counts as a Mobile UA Channel in 2026?
A user acquisition channel is any paid or owned source that gets a new user to install your app. Search (Apple Search Ads, Google App Campaigns), social (Meta, TikTok), programmatic networks, influencer and affiliate, and mobile OEM inventory (Dynamic Preloads, on-device display, alternative app stores) all count.
The mix has gotten more crowded because the old channels got more expensive. Ad spend on the major platforms keeps rising even as available user pools shrink, so unit economics for any single channel are declining faster than they used to. That’s pushed budget toward testing acquisition channels that weren’t on anyone’s radar three years ago.
Why Are the Big 4 Channels Hitting Diminishing Returns?
Most consumer apps still funnel the bulk of their ad spend through Google, Meta, Apple, and a handful of ad networks. That’s not going away. But UA managers increasingly report the same pattern: install volume plateaus while cost per install keeps climbing, and the users coming in convert at a lower rate than they did two years ago.
Part of this is simple competition. More advertisers are bidding for the same auction inventory. Part of it is platform dependency risk: a policy change, an algorithm update, or a bidding change on one platform can wipe out a UA team’s monthly target overnight. Teams that run 90% of spend through two platforms have no cushion when that happens.
The fix isn’t abandoning search and social. It’s making sure at least one meaningful channel sits outside that auction entirely, so a platform-side change doesn’t sink the whole month.
What Happened to Privacy Sandbox, and Does It Still Matter?
Privacy Sandbox on Android was supposed to be the next chapter in mobile measurement, a replacement for identifiers that still allowed some form of ad targeting and attribution. As of October 17, 2025, Privacy Sandbox on Android is officially deprecated. Google pulled back several core APIs due to low uptake across the ad technology ecosystem, and the industry-wide migration many UA teams had been planning simply isn’t happening as announced.
That doesn’t mean the pressure on privacy disappeared. App Tracking Transparency on iOS remains the primary, permanent constraint on identifier-based targeting, and regional privacy laws continue to tighten. What it means is that UA teams shouldn’t wait for a single new measurement standard to solve attribution. Channels that offer first-party, on-device targeting without relying on a fragile identifier chain (OEM inventory is one example) get more attractive precisely because they don’t depend on a standard that could get retired again.
What New Channels Are Worth Testing?
Mobile OEM advertising is the clearest example of a channel that’s moved from experimental to mainstream over the past two years. OEMs like Samsung, Xiaomi, and OPPO sell their own on-device inventory, including Dynamic Preloads during phone setup, lock-screen placements, and featured spots within their alternative app stores. This is inventory Google and Meta don’t have access to.
The scale is real. AVOW’s OEM partnerships alone reach over 1.85 billion daily active users, and those partners account for 86% of the global Android market share and 65% of the global mobile market. Real-world results back this up: Tripledot Studios used OEM display and preload inventory to outperform targets by 20% in EMEA and deliver 15% higher performance versus other preload channels. Magalu, an e-commerce app in Brazil, scaled its mobile OEM media investment by 50% year over year while maintaining low fraud rates.
For apps expanding into Android-first markets, especially India, Indonesia, and parts of Latin America, OEM inventory tends to outperform the usual channels early on, since device manufacturers control a larger share of discovery in those regions than Google Play alone does.
How Should UA Teams Budget and Test a New Channel?
Treat a new acquisition channel test the way you’d treat a creative test: small, contained, and fast to read. Set clear criteria for whether the test is worth continuing, and keep a few things in mind so new-channel tests stay useful instead of wasted spend:
- Ring-fence the budget. Pull 5-10% of monthly spend for the test so a bad week doesn’t blow the whole month’s target.
- Pick a short read window. UA managers rarely have to wait weeks. Look for directional signals (install cost, day-1 retention) within the first week, and decide in advance what counts as a promising result.
- Match the channel to app category. Gaming apps see different targeting and creative performance on OEM inventory than fintech or e-commerce apps do, so don’t reuse the same playbook across verticals.
- Keep MMP tracking consistent. Whatever channel you test, route it through the same attribution stack (Adjust, AppsFlyer, Singular, or similar) so the results are comparable to your existing channels.
The Channel Mix That Works in 2026
There’s no single “best” user acquisition channel this year, and any pitch that says otherwise is selling something. What’s changed is the cost of staying dependent on two or three platforms. Search and social still work. They don’t work alone anymore, not at the volume and margin to which most UA teams are held.
The teams pulling ahead are the ones treating channel diversification as a standing part of the budget, not a one-off experiment they’ll get to eventually.
See how OEM inventory fits into your channel mix → Book a Demo.
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