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.

waxmoon.net achieves the best ad optimization: its app-ads.txt has no errors and matches what its 2 ad networks expect (100% of 4 lines).

Checked 21 Oct 2026. 84 lines, 82 unique records, 0 duplicates, 0 invalid lines, 5 ad networks detected.

Google AdMob — accounts pub-7850385367812826, pub-8215342990215294, pub-2058131851147808: 3 lines in the file
TikTok Ad Network (Pangle) — account 5037054: 1 line in the file
Yango Ads — partner (reseller) lines only: 14 lines in the file, 400 expected lines missing
DSP Exchange — partner (reseller) lines only: 62 lines in the file, 400 expected lines missing
Bidmachine — partner (reseller) lines only: 13 lines in the file, 400 expected lines missing

Yes — https://waxmoon.net/app-ads.txt has 84 lines (checked 21 Oct 2026).

Its app-ads.txt lists Google AdMob, TikTok Ad Network (Pangle), Yango Ads, DSP Exchange, Bidmachine.

waxmoon.net achieves the best ad optimization: its app-ads.txt has no errors and matches what its 2 ad networks expect (100% of 4 lines).