Install fraud is the manipulation of mobile attribution data to generate fake installs, clicks, or conversions, stealing advertising budget without delivering real users.
Install fraud covers a range of techniques used by bad actors to generate fraudulent attribution events and claim credit for ad spend. The most common types are click injection (malware on a device fires a fake click immediately before an organic install, hijacking credit), click flooding (bots fire millions of fake clicks to win attribution by chance), SDK spoofing (simulating installs and in-app events without any real device or user), and device farms (real devices running automated scripts to generate fake installs at scale).
Fraud is most prevalent in cost-per-install campaigns and programmatic channels where ad inventory is bought through multiple intermediaries. Networks with less direct publisher relationships and weaker fraud detection are higher risk. Gaming apps and high-CPI categories are disproportionately targeted because the payout per fraudulent install is larger.
Mobile Measurement Partners (MMPs) like AppsFlyer and Adjust have built fraud detection layers into their attribution SDKs, using behavioral analysis, device fingerprint anomalies, and install pattern modeling to flag and reject fraudulent events before they're attributed.
Install fraud directly inflates your CPI and misattributes budget to fraudulent sources. Without fraud protection, you might be paying for 10,000 installs and only getting 6,000 real users, with the remaining 4,000 being bots or hijacked credit. This distorts every downstream metric: your reported ROAS looks worse, your retention rates drop because fake installs never engage, and budget flows toward fraudulent sources instead of real ones.
Example
“A gaming app running a $50,000 campaign through a programmatic network records 25,000 installs in AppsFlyer, but fraud detection flags 8,000 as click injection fraud. The real CPI for legitimate installs is $2.50, not the reported $2.00, and the fraudulent network gets blocked.”
An MMP is an independent third-party platform that attributes app installs and in-app events to the advertising sources that drove them.
Learn moreMobile AttributionClick-through attribution credits an ad for a conversion when a user clicked the ad and then completed the action within the attribution window.
Learn moreMobile AttributionProbabilistic attribution assigns conversion credit to ad exposures based on statistical likelihood rather than deterministic device identifiers.
Learn moreMobile User AcquisitionCPI is the average amount spent in advertising to generate one app install. It's the most common efficiency metric in mobile user acquisition.
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