Every app needs users. Getting them through paid media is one of the fastest routes to scale — and one of the fastest routes to wasting a significant budget if the agency buying your media does not understand what they are actually optimising for. A media buying agency that focuses on app installs should be obsessed with one thing beyond install volume: the quality of the users those installs represent.
Cheap installs are everywhere. Users who open the app, complete onboarding, and become paying customers are significantly harder to find, and the agencies that know how to find them are a fundamentally different proposition from the ones that simply buy traffic at scale.
This article tells you exactly what to look for and what to avoid before you commit your media budget to any agency.
Why App Install Media Buying Is a Specialist Discipline
Media buying for app installs is not the same as media buying for web traffic or brand awareness. It operates in a more technically complex environment with different success metrics, different platform dynamics, and a fundamentally different relationship between the ad and the outcome.
The post-install journey is what determines success.
In web advertising, a click that leads to a purchase is a clean conversion. In app install advertising, the install is only the beginning. What happens after the install whether the user opens the app, completes onboarding, engages with core features, and eventually converts to paid determines whether the media spend was worthwhile. A media buying agency that does not track and optimise for post-install behaviour is not doing app install media buying it is doing traffic buying with an app store as the destination.
Platform complexity is high and increasing.
The app install advertising landscape spans Meta, Google UAC, Apple Search Ads, TikTok, programmatic DSPs, and ad networks — each with different targeting capabilities, creative requirements, bidding models, and attribution frameworks. Managing campaigns effectively across this landscape requires genuine multi-platform expertise that few agencies have consistently across every channel.
Privacy changes have fundamentally altered the measurement environment.
Post-ATT iOS attribution, SKAdNetwork reporting, and the ongoing deprecation of device-level tracking have made accurate measurement significantly more complex. Agencies that have not adapted their measurement and optimisation approaches to this new environment are making decisions based on data that is no longer reliable.
What a Genuine App Install Media Buying Agency Looks Like
When evaluating which advertising platforms are best for mobile app installs, working with a specialized agency can make all the difference. The agencies that genuinely specialise in app install media buying share a consistent set of characteristics that separate them from generalists claiming the specialism:
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They ask about your post-install metrics before discussing budget. The first conversation with a genuine app install specialist is about Day 7 retention, in-app conversion rates, and user lifetime value not about CPI targets and monthly spend. Understanding what a retained user is worth to your business is what allows them to set a sensible CPI target. Agencies that start with budget and CPI are optimising for the wrong outcome from the first conversation.
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They have deep creative capability in-house. App install campaign performance is driven more by creative quality than by any other single variable. An agency that relies on client-supplied creative or outsources production is permanently behind agencies that can generate, test, and iterate on creative at speed. Creative velocity the ability to produce and test multiple creative concepts simultaneously is one of the primary competitive advantages a strong media buying agency brings.
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They work across multiple platforms with genuine expertise in each. A strong app install media buying agency does not have a favourite platform. It has a methodology for identifying which platform mix best serves each specific app, category, and audience and the genuine expertise to execute effectively across Meta, Google, Apple Search Ads, TikTok, and programmatic simultaneously.
Are Your App Install Campaigns Buying Users or Just Installs?
We build media buying strategies around user quality not install volume.
The Platforms That Matter for App Install Media Buying
Understanding what each major platform does and where it fits in an app install strategy is essential for evaluating whether an agency is using the right channel mix for your app.
Meta — Facebook and Instagram.
The highest-scale platform for app install campaigns globally. Strong lookalike audience targeting, diverse creative formats including video, carousel, and Stories, and broad reach across demographics make it the primary channel for most consumer apps. Post-ATT changes have made iOS campaign management on Meta significantly more complex an agency that cannot explain their iOS strategy on Meta in specific terms is not managing it effectively.
Google UAC, Universal App Campaigns.
Automated campaigns delivering ads across Google Search, Google Play, YouTube, and the Google Display Network from a single campaign structure. Particularly strong for apps where search intent is a significant discovery pathway — utility apps, productivity tools, finance apps, and health apps all benefit from Google’s search inventory. Less creative control than Meta but significant scale and strong intent signals.
Apple Search Ads.
The highest-intent channel in app install advertising capturing users who are actively searching the App Store for apps like yours. More expensive per install than broader platforms but consistently delivers users with stronger retention and higher conversion rates. Essential for apps where App Store search is a meaningful organic discovery channel.
TikTok.
The fastest-growing app install channel and significantly underutilised by most advertisers which means less competition and stronger cost efficiency for brands that invest in it early. Creative must be native to the platform entertainment-first, authentic, and visually engaging. Traditional ad formats perform poorly on TikTok. Agencies with genuine TikTok creative capability are operating at a different level from those running standard video ads on the platform.
Programmatic DSPs.
Demand-side platforms like DV360, The Trade Desk, and specialist app-focused DSPs like Moloco provide access to app install inventory across thousands of apps and mobile web environments. Programmatic buying adds scale and reach beyond the major social and search platforms and is particularly valuable for retargeting and audience extension strategies.
How to Evaluate a Media Buying Agency Before You Commit
The evaluation process for an app install media buying agency should be rigorous. These are the questions and tests that reveal what an agency is actually capable of.
Ask for platform-specific case studies in your app category.
Gaming app case studies do not tell you how an agency will perform for a fintech or health app. User behaviour, creative approaches, and platform strategies differ significantly by category. Relevant vertical experience is not optional, it is a primary selection criterion.
Request a detailed explanation of their creative testing methodology.
How many creative concepts do they test simultaneously. What variables do they isolate in each test. How do they determine statistical significance before drawing conclusions. How quickly can they move from a failed test to the next iteration. The quality and specificity of this answer tells you whether creative testing is a genuine capability or a claimed one.
Ask how they handle iOS attribution post-ATT.
A strong agency will explain their SKAdNetwork configuration approach, how they use modelled attribution to fill the gaps in deterministic data, and how they interpret the limited signals available for iOS campaign optimisation. A vague answer about tracking tools and privacy compliance is not sufficient.
Media Buying That Fills Your App With the Right Users
Remarkably Different buys app install media across every major platform with a single focus — users who convert.
The Commercial Structure of App Install Media Buying
Understanding how media buying agencies are compensated helps you evaluate whether their incentives align with your outcomes.
Percentage of media spend.
The most common model typically ten to fifteen percent of managed media budget. Simple and transparent but can create an incentive to recommend higher spend regardless of whether it is the most efficient use of budget.
Fixed monthly retainer.
A fixed fee regardless of media spend. Aligns agency incentives with campaign performance rather than spend volume. Requires clear scope definition to avoid disagreements about what is included.
Performance-based fees.
Agency compensation tied to specific campaign outcomes cost per install, cost per registration, cost per subscription. Strong alignment of incentives but requires robust attribution infrastructure to calculate accurately and can encourage short-term optimisation at the expense of long-term strategy.
Hybrid models.
A base retainer covering management and strategy, plus a performance bonus above agreed benchmarks. Often the best alignment of incentives the base retainer covers costs, the performance element creates urgency around outcomes.
Whichever model you agree on, ensure that data ownership, reporting transparency, and the process for handling underperformance are all defined clearly in the contract before work begins.
What Strong Ongoing Media Buying Management Looks Like
Hiring a media buying agency is not a one-time decision. The ongoing management relationship determines whether the initial potential translates into sustained results.
Strong ongoing management includes weekly performance reviews covering install volume, CPI, post-install conversion events, and retention metrics by channel. It includes proactive creative refresh before fatigue causes performance to degrade. It includes regular audience strategy reviews as platform data accumulates and lookalike models improve.
It also includes honest communication about what is not working. The best media buying agencies surface problems before clients notice them — with a clear plan to address them. Agencies that only communicate good news are hiding something.
Frequently Asked Questions
How much media budget do I need for app install campaigns?
A minimum of £5,000–£10,000 per month in media spend is typically required to generate sufficient data for meaningful optimisation across multiple platforms. Below this threshold, learning cycles are too slow. Serious growth campaigns typically invest £20,000–£100,000 per month in media across channels.
What is a realistic CPI target for app install campaigns?
CPI varies significantly by category, platform, and geography. More importantly, CPI targets should be derived from your user lifetime value — working backwards from what a retained user is worth to determine what an install is worth paying for. Category benchmarks are a starting point, not a target.
How long before app install media buying campaigns are fully optimised?
Initial performance data is available within two to four weeks. Meaningful optimisation decisions require four to eight weeks of consistent data. Campaigns typically reach mature performance levels — with stable CPI and reliable user quality metrics — after three to four months of active management.
Should I run app install campaigns on all platforms simultaneously or start with one?
Starting with one or two platforms and expanding as data accumulates is typically more efficient than launching everywhere simultaneously. Meta and Apple Search Ads are the most common starting combination — broad scale plus high intent. Expand to additional platforms once you have stable performance data from the initial channels.
How do I know if my media buying agency is delivering user quality or just install volume?
Compare the Day 7 and Day 30 retention rates of paid users against organic users. Strong media buying produces paid users whose post-install behaviour resembles organic users. A significant retention gap between paid and organic indicates the agency is optimising for install volume rather than user value.
A media buying agency that focuses on app installs should be obsessed with what happens after the install — not just how cheaply they can deliver one. Remarkably Different buys app install media with a single measure of success: users who open, engage, and convert. If your current campaigns are delivering installs but not growth, let’s talk about what is actually going wrong.
App Install Media Buying Built Around Users Who Actually Stay
Remarkably Different manages app install campaigns across every major platform with one goal — sustainable, scalable user growth.
