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.

freenbuy.com app-ads.txt check

freenbuy.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 19 Oct 2026. 60 lines, 58 unique records, 0 duplicates, 2 invalid lines, 6 ad networks detected.

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

Google AdMob — account pub-7382163239826290: 1 line in the file
Meta Audience Network — account 151818695821033: 1 line in the file
Mintegral — partner (reseller) lines only: 15 lines in the file, 400 expected lines missing
InMobi — partner (reseller) lines only: 10 lines in the file, 261 expected lines missing
Yango Ads — partner (reseller) lines only: 21 lines in the file, 400 expected lines missing
DSP Exchange — partner (reseller) lines only: 16 lines in the file, 400 expected lines missing

Invalid lines

google.com, , DIRECT, f08c47fec0942fa0
yahoo.com, 58905, RESELLER e1a5b5b6e3255540

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

FAQ

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

Yes — https://freenbuy.com/app-ads.txt has 60 lines (checked 19 Oct 2026).

Which ad networks does freenbuy.com work with?

Its app-ads.txt lists Google AdMob, Meta Audience Network, Mintegral, InMobi, Yango Ads, DSP Exchange.

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