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.

leedegree.github.io app-ads.txt check

leedegree.github.io 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 20 Oct 2026. 4 lines, 3 unique records, 0 duplicates, 1 invalid lines, 2 ad networks detected.

Ad networks in leedegree.github.io/app-ads.txt

Google AdMob — accounts pub-2299291161271404, pub-1418645002027017: 2 lines in the file
Meta Audience Network — account 2171442449583969: 1 line in the file

Invalid lines

facebook.com, 1000001, 2171442449583969, c3e20eee3f780d68

Corrected file: leedegree.github.io app-ads.txt (fixed).

FAQ

Does leedegree.github.io have an app-ads.txt?

Yes — https://leedegree.github.io/app-ads.txt has 4 lines (checked 20 Oct 2026).

Which ad networks does leedegree.github.io work with?

Its app-ads.txt lists Google AdMob, Meta Audience Network.

Is the app-ads.txt of leedegree.github.io correct?