A reattribution window is a specific period of time during which a returning user who reinstalls an app cannot be counted as a new install. Instead, any reinstall that happens inside this window is treated as part of the user’s original lifecycle rather than a brand new acquisition.
Reattribution windows are used by advertisers, attribution providers, and analytics teams to prevent double counting of installs and to keep user level metrics accurate. They are especially important in environments where re engagement campaigns are active and users may uninstall and reinstall frequently.
A reattribution window is a configurable time frame that begins the moment a user installs an app. If that user later uninstalls the app and reinstalls it within that window, the reinstall is not considered a new acquisition. It does not generate a new install record, does not trigger an install postback, and does not credit any media source.
This mechanism prevents media partners from receiving credit for users who are simply returning within a short period rather than being newly acquired.
How Reattribution Windows Work
Here is how the process functions from the moment the first install occurs:
The user installs the app
This moment starts the reattribution window. The duration of the window is defined by the advertiser, depending on the app’s lifecycle and the typical behavior of its users.
The user later uninstalls the app
At this point the reattribution window is still active.
The user engages with a re engagement campaign
This could be a push retargeting campaign, a remarketing ad, or a promotional message designed to bring the user back.
The user reinstalls the app
If the reinstall occurs inside the reattribution window, it does not count as a new install. No install attribution is assigned, no postback is sent, and all further in app events are considered organic.
If the reinstall happens after the window closes
Only then can the reinstall be treated as a new install and attributed normally. In this case, engagement with a campaign may lead to a valid postback and credit for the media source.
Why Reattribution Windows Matter
Accuracy in acquisition reporting
Without reattribution windows, reinstalling the same app multiple times in a short period would inflate install metrics and distort campaign performance.
Fair credit for media sources
Media partners should be rewarded for truly new users, not for existing users who briefly return.
Cleaner revenue and retention metrics
User churn, lifetime value, and return patterns can only be interpreted correctly if reinstalls are classified consistently.
Better spend allocation
Marketing teams rely on accurate attribution to understand which channels drive real value. Reattribution windows play a key role in that clarity.
Configuring the Reattribution Window
The ideal length depends on the app category and user behavior.
Examples include:
A short window for utility apps with frequent install churn
A medium window for retail or social apps
A longer window for games with periodic seasons or large content updates
Choosing the right window helps balance accuracy and flexibility.
Common Misunderstandings
A reinstall always counts as a new install
This is incorrect. Only reinstalls outside the window qualify for new install attribution.
Events after a reinstall are always attributed to media
If the reinstall is inside the window, all future events are counted as organic.
Reattribution and re engagement are the same
Re engagement can influence a user to return, but it does not guarantee new attribution unless the reinstall happens after the window closes.
The window begins when the user completes the original installation of the app.
Yes. The window is configurable and should reflect the app’s typical usage patterns.
They do not create a new install and no media source receives credit.
Yes. They are marked as organic and remain part of the user’s ongoing activity.
Because it would inflate metrics, reward media sources unfairly, and distort retention and revenue analysis.