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.

uniquegamestudio.com 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 19 Oct 2026. 47 lines, 24 unique records, 0 duplicates, 0 invalid lines, 7 ad networks detected.

Google AdMob — account pub-3328466815496927: 1 line in the file
Meta Audience Network — account 309137386334500: 1 line in the file
BIGO Ads — partner (reseller) lines only: 11 lines in the file, 400 expected lines missing
Yango Ads — partner (reseller) lines only: 13 lines in the file, 400 expected lines missing
DSP Exchange — partner (reseller) lines only: 11 lines in the file, 400 expected lines missing
Maticoo (zMaticoo) — partner (reseller) lines only: 15 lines in the file, 400 expected lines missing
Bidmachine — partner (reseller) lines only: 19 lines in the file, 400 expected lines missing

Yes — https://uniquegamestudio.com/app-ads.txt has 47 lines (checked 19 Oct 2026).

Its app-ads.txt lists Google AdMob, Meta Audience Network, BIGO Ads, Yango Ads, DSP Exchange, Maticoo (zMaticoo), Bidmachine.

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