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.

twpkinfo.com app-ads.txt check

twpkinfo.com is missing out on higher CPMs: its app-ads.txt has 2 invalid lines. Buyers' crawlers skip invalid lines, so those sellers can't be verified.

Checked 20 Oct 2026. 30 lines, 23 unique records, 1 duplicates, 2 invalid lines, 1 ad network detected.

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

Google AdMob — accounts pub-8334066462319549, pub-1937576406332709, pub-6646096327011050 and 1 more: 4 lines in the file

Invalid lines

freewheel.tv, 204561, RESELLER freewheel.tv, 204569, RESELLER
google.com, , DIRECT, f08c47fec0942fa0

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

FAQ

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

Yes — https://twpkinfo.com/app-ads.txt has 30 lines (checked 20 Oct 2026).

Which ad networks does twpkinfo.com work with?

Its app-ads.txt lists Google AdMob.

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