An IAB Tech Lab standard that lets app publishers declare which ad networks are authorized to sell their inventory.

Where do I put the app-ads.txt file?

At the root of the developer website listed in your App Store / Google Play page, e.g. https://studio.com/app-ads.txt.

What is a Certification Authority ID?

An optional TAG-ID of the ad system, the 4th field of an app-ads.txt record.

u5e93bed3.app-ads-txt.com achieves the best ad optimization: its app-ads.txt has no errors and matches what its ad network expects (100% of 1 line).

Checked 19 Oct 2026. 56 lines, 56 unique records, 0 duplicates, 0 invalid lines, 5 ad networks detected.

Google AdMob — accounts pub-1067374679252537, pub-3184487253168181, pub-4878508349196632 and 4 more: 7 lines in the file
Mintegral — partner (reseller) lines only: 10 lines in the file, 400 expected lines missing
Chartboost — partner (reseller) lines only: 10 lines in the file, 400 expected lines missing
Yango Ads — partner (reseller) lines only: 17 lines in the file, 400 expected lines missing
Bidmachine — partner (reseller) lines only: 11 lines in the file, 400 expected lines missing

Yes — https://u5e93bed3.app-ads-txt.com/app-ads.txt has 56 lines (checked 19 Oct 2026).

Its app-ads.txt lists Google AdMob, Mintegral, Chartboost, Yango Ads, Bidmachine.

u5e93bed3.app-ads-txt.com achieves the best ad optimization: its app-ads.txt has no errors and matches what its ad network expects (100% of 1 line).