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.

joyn.de app-ads.txt check

joyn.de achieves the best ad optimization: its app-ads.txt has no errors and matches what its 2 ad networks expect (100% of 2 lines).

Checked 19 Oct 2026. 510 lines, 368 unique records, 52 duplicates, 0 invalid lines, 15 ad networks detected.

Ad networks in joyn.de/app-ads.txt

Google AdMob — account pub-2671258679073709: 1 line in the file
PubMatic — account 158103: 1 line in the file
Mintegral — partner (reseller) lines only: 29 lines in the file, 400 expected lines missing
Liftoff Monetize (Vungle) — partner (reseller) lines only: 12 lines in the file, 378 expected lines missing
Chartboost — partner (reseller) lines only: 21 lines in the file, 400 expected lines missing
DT Exchange (Fyber) — partner (reseller) lines only: 16 lines in the file, 400 expected lines missing
Yandex Ads — partner (reseller) lines only: 11 lines in the file, 157 expected lines missing
BIGO Ads — partner (reseller) lines only: 36 lines in the file, 400 expected lines missing
Yango Ads — partner (reseller) lines only: 74 lines in the file, 400 expected lines missing
DSP Exchange — partner (reseller) lines only: 45 lines in the file, 400 expected lines missing
Maticoo (zMaticoo) — partner (reseller) lines only: 27 lines in the file, 400 expected lines missing
Verve (PubNative) — partner (reseller) lines only: 26 lines in the file, 400 expected lines missing
CAS.ai — partner (reseller) lines only: 11 lines in the file, 154 expected lines missing
DSail — partner (reseller) lines only: 11 lines in the file, 154 expected lines missing
Bidmachine — partner (reseller) lines only: 81 lines in the file, 400 expected lines missing

Corrected file: joyn.de app-ads.txt (fixed).

FAQ

Does joyn.de have an app-ads.txt?

Yes — https://joyn.de/app-ads.txt has 510 lines (checked 19 Oct 2026).

Which ad networks does joyn.de work with?

Its app-ads.txt lists Google AdMob, PubMatic, Mintegral, Liftoff Monetize (Vungle), Chartboost, DT Exchange (Fyber), Yandex Ads, BIGO Ads, Yango Ads, DSP Exchange, Maticoo (zMaticoo), Verve (PubNative) and 3 more.

Is the app-ads.txt of joyn.de correct?