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.

xvadim.github.io achieves the best ad optimization: its app-ads.txt has no errors and matches what its 2 ad networks expect (100% of 2 lines).

Checked 20 Oct 2026. 85 lines, 71 unique records, 0 duplicates, 0 invalid lines, 6 ad networks detected.

Google AdMob — account pub-5530463802314928: 1 line in the file
Index Exchange — account 194895: 1 line in the file
Mintegral — partner (reseller) lines only: 15 lines in the file, 400 expected lines missing
InMobi — partner (reseller) lines only: 10 lines in the file, 261 expected lines missing
Yango Ads — partner (reseller) lines only: 24 lines in the file, 400 expected lines missing
DSP Exchange — partner (reseller) lines only: 22 lines in the file, 400 expected lines missing

Yes — https://xvadim.github.io/app-ads.txt has 85 lines (checked 20 Oct 2026).

Its app-ads.txt lists Google AdMob, Index Exchange, Mintegral, InMobi, Yango Ads, DSP Exchange.

xvadim.github.io achieves the best ad optimization: its app-ads.txt has no errors and matches what its 2 ad networks expect (100% of 2 lines).