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.

playcontestofchampions.com app-ads.txt check

playcontestofchampions.com is missing out on higher CPMs: its app-ads.txt has 1 invalid line. Buyers' crawlers skip invalid lines, so those sellers can't be verified.

Checked 19 Oct 2026. 59 lines, 55 unique records, 0 duplicates, 1 invalid lines, 3 ad networks detected.

Ad networks in playcontestofchampions.com/app-ads.txt

Meta Audience Network — account 10152604906203104: 1 line in the file
ironSource / LevelPlay — partner (reseller) lines only: 13 lines in the file, 112 expected lines missing
Yango Ads — partner (reseller) lines only: 19 lines in the file, 400 expected lines missing

Invalid lines

ironsrc.com, [MCOC pub id N/A], Direct

Corrected file: playcontestofchampions.com app-ads.txt (fixed).

FAQ

Does playcontestofchampions.com have an app-ads.txt?

Yes — https://playcontestofchampions.com/app-ads.txt has 59 lines (checked 19 Oct 2026).

Which ad networks does playcontestofchampions.com work with?

Its app-ads.txt lists Meta Audience Network, ironSource / LevelPlay, Yango Ads.

Is the app-ads.txt of playcontestofchampions.com correct?