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.

gpfans.com app-ads.txt check

gpfans.com achieves the best ad optimization: its app-ads.txt has no errors and matches what its 10 ad networks expect (100% of 25 lines).

Checked 20 Oct 2026. 565 lines, 492 unique records, 8 duplicates, 0 invalid lines, 23 ad networks detected.

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

Google AdMob — accounts pub-9386789909068249, pub-2329337138110868, pub-4346803846097853: 3 lines in the file
Xandr (Microsoft) — accounts 2928, 8233, 2837: 3 lines in the file
Magnite (Rubicon) — accounts 22064, 13510, 17280 and 2 more: 5 lines in the file
Sovrn — account 397546: 1 line in the file
PubMatic — accounts 157743, 161796, 156695: 3 lines in the file
Yahoo — accounts 58578, 55774: 2 lines in the file
Amazon Publisher Services — accounts f02b23da-1d66-47e3-ba9a-4639e08c6166, 6f354287-be81-4032-bf64-3a62262fb72f: 2 lines in the file
TripleLift — accounts 11309, 11309-EB: 2 lines in the file
Criteo — accounts B-069516, B-060094: 2 lines in the file
OpenX — accounts 537151081, 545650440, 545728612 and 1 more: 4 lines in the file
Mintegral — partner (reseller) lines only: 58 lines in the file, 400 expected lines missing
Liftoff Monetize (Vungle) — partner (reseller) lines only: 24 lines in the file, 366 expected lines missing
Chartboost — partner (reseller) lines only: 35 lines in the file, 400 expected lines missing
InMobi — partner (reseller) lines only: 22 lines in the file, 249 expected lines missing
DT Exchange (Fyber) — partner (reseller) lines only: 29 lines in the file, 400 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: 30 lines in the file, 400 expected lines missing
Yango Ads — partner (reseller) lines only: 111 lines in the file, 400 expected lines missing
DSP Exchange — partner (reseller) lines only: 55 lines in the file, 400 expected lines missing
Maticoo (zMaticoo) — partner (reseller) lines only: 32 lines in the file, 400 expected lines missing
Verve (PubNative) — partner (reseller) lines only: 40 lines in the file, 400 expected lines missing
HyprMX — partner (reseller) lines only: 26 lines in the file, 343 expected lines missing
Bidmachine — partner (reseller) lines only: 86 lines in the file, 400 expected lines missing

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

FAQ

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

Yes — https://gpfans.com/app-ads.txt has 565 lines (checked 20 Oct 2026).

Which ad networks does gpfans.com work with?

Its app-ads.txt lists Google AdMob, Xandr (Microsoft), Magnite (Rubicon), Sovrn, PubMatic, Yahoo, Amazon Publisher Services, TripleLift, Criteo, OpenX, Mintegral, Liftoff Monetize (Vungle) and 11 more.

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