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.

gcatchletics.com app-ads.txt check

gcatchletics.com 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 19 Oct 2026. 7,302 lines, 5,096 unique records, 2,172 duplicates, 1 invalid lines, 39 ad networks detected.

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

AppLovin — accounts 3887cf96e3416e33c643bc6a1991f8ab, 01494ef4ab4063adfe26473538821443: 37 lines in the file
Bidmachine — accounts 1117, 228, 228-1 and 14 more: 400 lines in the file, 102 expected lines missing
PubMatic — accounts 167808, 161853, 95054: 3 lines in the file
CAS.ai — accounts b5a73ae1, babe9c54: 145 lines in the file, 20 expected lines missing
Start.io — account 117514417: 125 lines in the file, 33 expected lines missing
Magnite (Rubicon) — accounts 26846, 20086, 166535: 3 lines in the file
Google AdMob — accounts pub-4209704005857546, pub-4586415728471297, pub-8584156348842922 and 1 more: 4 lines in the file
DT Exchange (Fyber) — account 211404: 400 lines in the file
InMobi — accounts 3f250d673cfa4d8fbf6f036a5b80ace5, cb6a6239dfec478f818c1ffca00ca440, 53bca9c0c47841f2ab925a46f9568a6b and 1 more: 265 lines in the file, 10 expected lines missing
ironSource / LevelPlay — account 246261: 124 lines in the file, 2 expected lines missing
OpenX — accounts 562730617, 563905670, 564921063 and 1 more: 4 lines in the file
TripleLift — accounts 14594, 6998, 14146: 3 lines in the file
Yahoo — account 60013: 1 line in the file
Sovrn — accounts 411915, 563477, 594162 and 5 more: 8 lines in the file
BlueSea — accounts 203650, 204037: 28 lines in the file, 11 expected lines missing
Xandr (Microsoft) — accounts 14416, 10815: 2 lines in the file
Smaato — account 1100052914: 1 line in the file
Meta Audience Network — accounts 1443801529446837, 4470656473255451: 2 lines in the file
Amazon Publisher Services — account 5d8ed25e-57cc-441a-b62a-127b34faae4e: 1 line in the file
Maticoo (zMaticoo) — accounts 113068, 5135063: 293 lines in the file, 153 expected lines missing
BIGO Ads — accounts 882, b4whb23ir4, 23172924: 400 lines in the file, 17 expected lines missing
Liftoff Monetize (Vungle) — account 5cc67787e15f77001148cd13: 390 lines in the file, 1 expected line missing
Mintegral — account 17219: 400 lines in the file, 16 expected lines missing
TikTok Ad Network (Pangle) — account 63600: 1 line in the file
Unity Ads — account 1466307: 158 lines in the file, 3 expected lines missing
Chartboost — partner (reseller) lines only: 400 lines in the file, 226 expected lines missing
Yandex Ads — partner (reseller) lines only: 151 lines in the file, 17 expected lines missing
VK Ads (myTarget) — partner (reseller) lines only: 93 lines in the file, 51 expected lines missing
Yango Ads — partner (reseller) lines only: 400 lines in the file, 400 expected lines missing
Bidease — partner (reseller) lines only: 39 lines in the file, 10 expected lines missing
Display.io — partner (reseller) lines only: 11 lines in the file, 21 expected lines missing
DSP Exchange — partner (reseller) lines only: 313 lines in the file, 248 expected lines missing
Madex — partner (reseller) lines only: 4 lines in the file, 14 expected lines missing
Monetrix — partner (reseller) lines only: 65 lines in the file, 28 expected lines missing
Prado — partner (reseller) lines only: 21 lines in the file, 6 expected lines missing
Verve (PubNative) — partner (reseller) lines only: 400 lines in the file, 400 expected lines missing
HyprMX — partner (reseller) lines only: 202 lines in the file, 167 expected lines missing
Kidoz — partner (reseller) lines only: 17 lines in the file, 5 expected lines missing
DSail — partner (reseller) lines only: 145 lines in the file, 20 expected lines missing

Invalid lines

lemmatechnologies,1844,RESELLER

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

FAQ

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

Yes — https://gcatchletics.com/app-ads.txt has 7,302 lines (checked 19 Oct 2026).

Which ad networks does gcatchletics.com work with?

Its app-ads.txt lists AppLovin, Bidmachine, PubMatic, CAS.ai, Start.io, Magnite (Rubicon), Google AdMob, DT Exchange (Fyber), InMobi, ironSource / LevelPlay, OpenX, TripleLift and 27 more.

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