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.

france24.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. 511 lines, 444 unique records, 33 duplicates, 0 invalid lines, 9 ad networks detected.

Google AdMob — accounts pub-3927621473031827, pub-6107357069032132, pub-7317079448844277 and 3 more: 6 lines in the file
Mintegral — partner (reseller) lines only: 27 lines in the file, 400 expected lines missing
BIGO Ads — partner (reseller) lines only: 17 lines in the file, 400 expected lines missing
Yango Ads — partner (reseller) lines only: 50 lines in the file, 400 expected lines missing
DSP Exchange — partner (reseller) lines only: 31 lines in the file, 400 expected lines missing
Maticoo (zMaticoo) — partner (reseller) lines only: 25 lines in the file, 400 expected lines missing
Verve (PubNative) — partner (reseller) lines only: 20 lines in the file, 400 expected lines missing
HyprMX — partner (reseller) lines only: 10 lines in the file, 359 expected lines missing
Bidmachine — partner (reseller) lines only: 51 lines in the file, 400 expected lines missing

Yes — https://france24.com/app-ads.txt has 511 lines (checked 19 Oct 2026).

Its app-ads.txt lists Google AdMob, Mintegral, BIGO Ads, Yango Ads, DSP Exchange, Maticoo (zMaticoo), Verve (PubNative), HyprMX, Bidmachine.

france24.com achieves the best ad optimization: its app-ads.txt has no errors and matches what its ad network expects (100% of 1 line).