Standards
App-ads.txt — Definition & Explanation
The mobile app equivalent of ads.txt. Publishers host this file on their developer website's root domain to declare which entities are authorized to sell their in-app inventory, preventing unauthorized reselling of app ad inventory.
How App-ads.txt Works
App publishers host app-ads.txt on their company website domain (not the app store page). Buyers verify app inventory by checking the developer's website for authorized sellers before bidding.
Why App-ads.txt Matters for Publishers
App-ads.txt prevents domain spoofing of app inventory. App publishers without app-ads.txt may see demand restrictions from buyers who require supply chain verification.
Frequently Asked Questions
Where should app-ads.txt be hosted?
On the developer's website domain at the root path (e.g., company.com/app-ads.txt), not on the app store page.
Do I need both ads.txt and app-ads.txt?
Web publishers need ads.txt. App publishers need app-ads.txt. Publishers with both web and app inventory need both files.
Does Stellor Media support in-app app-ads.txt?
Stellor Media provides the appropriate app-ads.txt entries for app publishers who partner with us.
Related Terms
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