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.

chumob.me app-ads.txt check

chumob.me 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 21 Oct 2026. 166 lines, 156 unique records, 9 duplicates, 1 invalid lines, 16 ad networks detected.

Ad networks in chumob.me/app-ads.txt

Google AdMob — account pub-3515083758556139: 1 line in the file
Sovrn — accounts 439432, 439432-eb: 2 lines in the file
PubMatic — account 165874: 1 line in the file
Mintegral — partner (reseller) lines only: 30 lines in the file, 400 expected lines missing
Liftoff Monetize (Vungle) — partner (reseller) lines only: 22 lines in the file, 368 expected lines missing
Chartboost — partner (reseller) lines only: 24 lines in the file, 400 expected lines missing
Yandex Ads — partner (reseller) lines only: 10 lines in the file, 158 expected lines missing
VK Ads (myTarget) — partner (reseller) lines only: 10 lines in the file, 134 expected lines missing
BIGO Ads — partner (reseller) lines only: 35 lines in the file, 400 expected lines missing
Yango Ads — partner (reseller) lines only: 65 lines in the file, 400 expected lines missing
DSP Exchange — partner (reseller) lines only: 32 lines in the file, 400 expected lines missing
Maticoo (zMaticoo) — partner (reseller) lines only: 24 lines in the file, 400 expected lines missing
Verve (PubNative) — partner (reseller) lines only: 38 lines in the file, 400 expected lines missing
CAS.ai — partner (reseller) lines only: 10 lines in the file, 155 expected lines missing
DSail — partner (reseller) lines only: 10 lines in the file, 155 expected lines missing
Bidmachine — partner (reseller) lines only: 58 lines in the file, 400 expected lines missing

Invalid lines

pubmatic.com, 165239 RESELLER, 5d62403b186f2ace

Corrected file: chumob.me app-ads.txt (fixed).

FAQ

Does chumob.me have an app-ads.txt?

Yes — https://chumob.me/app-ads.txt has 166 lines (checked 21 Oct 2026).

Which ad networks does chumob.me work with?

Its app-ads.txt lists Google AdMob, Sovrn, PubMatic, Mintegral, Liftoff Monetize (Vungle), Chartboost, Yandex Ads, VK Ads (myTarget), BIGO Ads, Yango Ads, DSP Exchange, Maticoo (zMaticoo) and 4 more.

Is the app-ads.txt of chumob.me correct?