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.

mierla.co app-ads.txt check

mierla.co achieves the best ad optimization: its app-ads.txt has no errors and matches what its 3 ad networks expect (100% of 288 lines).

Checked 20 Oct 2026. 240 lines, 228 unique records, 2 duplicates, 0 invalid lines, 21 ad networks detected.

Ad networks in mierla.co/app-ads.txt

Google AdMob — account pub-3856977788453087: 1 line in the file
Unity Ads — account 127627040: 161 lines in the file
ironSource / LevelPlay — account 666055: 125 lines in the file, 1 expected line missing
Mintegral — partner (reseller) lines only: 39 lines in the file, 400 expected lines missing
Liftoff Monetize (Vungle) — partner (reseller) lines only: 39 lines in the file, 351 expected lines missing
Chartboost — partner (reseller) lines only: 32 lines in the file, 400 expected lines missing
InMobi — partner (reseller) lines only: 33 lines in the file, 238 expected lines missing
DT Exchange (Fyber) — partner (reseller) lines only: 49 lines in the file, 400 expected lines missing
Yandex Ads — partner (reseller) lines only: 18 lines in the file, 150 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: 64 lines in the file, 400 expected lines missing
Yango Ads — partner (reseller) lines only: 121 lines in the file, 400 expected lines missing
Maticoo (zMaticoo) — partner (reseller) lines only: 29 lines in the file, 400 expected lines missing
Prado — partner (reseller) lines only: 9 lines in the file, 18 expected lines missing
Verve (PubNative) — partner (reseller) lines only: 54 lines in the file, 400 expected lines missing
HyprMX — partner (reseller) lines only: 16 lines in the file, 353 expected lines missing
Start.io — partner (reseller) lines only: 17 lines in the file, 140 expected lines missing
Kidoz — partner (reseller) lines only: 10 lines in the file, 12 expected lines missing
CAS.ai — partner (reseller) lines only: 17 lines in the file, 148 expected lines missing
DSail — partner (reseller) lines only: 17 lines in the file, 148 expected lines missing
Bidmachine — partner (reseller) lines only: 91 lines in the file, 400 expected lines missing

Corrected file: mierla.co app-ads.txt (fixed).

FAQ

Does mierla.co have an app-ads.txt?

Yes — https://mierla.co/app-ads.txt has 240 lines (checked 20 Oct 2026).

Which ad networks does mierla.co work with?

Its app-ads.txt lists Google AdMob, Unity Ads, ironSource / LevelPlay, Mintegral, Liftoff Monetize (Vungle), Chartboost, InMobi, DT Exchange (Fyber), Yandex Ads, VK Ads (myTarget), BIGO Ads, Yango Ads and 9 more.

Is the app-ads.txt of mierla.co correct?