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.

u-dictionary.com app-ads.txt check

u-dictionary.com is missing out on higher CPMs: its app-ads.txt has 5 invalid lines and lists only 1,420 of the 2,327 lines its 14 ad networks expect (39% missing). Unlisted sellers can't be verified, so buyers bid less or skip the inventory.

Checked 20 Oct 2026. 2,964 lines, 1,563 unique records, 1,395 duplicates, 5 invalid lines, 30 ad networks detected.

Ad networks in u-dictionary.com/app-ads.txt

Google AdMob — account pub-9815583076686321: 1 line in the file
Meta Audience Network — account 1177610212338353: 1 line in the file
Mintegral — accounts 16943, 22942: 400 lines in the file, 132 expected lines missing
InMobi — accounts 75ef39c5a049470d8d04c124fda2e7ea, cb6a6239dfec478f818c1ffca00ca440, 5992f92bb5a64988b29dbc9fb15b8fc8: 118 lines in the file, 156 expected lines missing
Index Exchange — account 192585: 1 line in the file
Vungle — account 61bc2a3c6b7c160017b2d3ad: 305 lines in the file, 55 expected lines missing
AppLovin — account deb6837fc27d2cc90531b53de1e18570: 33 lines in the file, 3 expected lines missing
Unity Ads — account 3929280: 51 lines in the file, 110 expected lines missing
ironSource / LevelPlay — account 386086: 54 lines in the file, 72 expected lines missing
Smaato — accounts 1100051367, 1100057628, 1100057546: 3 lines in the file
PubMatic — account 158060: 1 line in the file
Criteo — accounts B-057702, B-063105: 2 lines in the file
TikTok Ad Network (Pangle) — account 5000820: 1 line in the file
Maticoo (zMaticoo) — account 114490: 66 lines in the file, 379 expected lines missing
Chartboost — partner (reseller) lines only: 378 lines in the file, 387 expected lines missing
DT Exchange (Fyber) — partner (reseller) lines only: 157 lines in the file, 293 expected lines missing
Yandex Ads — partner (reseller) lines only: 59 lines in the file, 109 expected lines missing
VK Ads (myTarget) — partner (reseller) lines only: 88 lines in the file, 56 expected lines missing
BIGO Ads — partner (reseller) lines only: 199 lines in the file, 400 expected lines missing
Yango Ads — partner (reseller) lines only: 400 lines in the file, 400 expected lines missing
DSP Exchange — partner (reseller) lines only: 253 lines in the file, 308 expected lines missing
Monetrix — partner (reseller) lines only: 13 lines in the file, 80 expected lines missing
Prado — partner (reseller) lines only: 6 lines in the file, 21 expected lines missing
Verve (PubNative) — partner (reseller) lines only: 253 lines in the file, 400 expected lines missing
HyprMX — partner (reseller) lines only: 115 lines in the file, 254 expected lines missing
Start.io — partner (reseller) lines only: 20 lines in the file, 137 expected lines missing
Kidoz — partner (reseller) lines only: 5 lines in the file, 17 expected lines missing
CAS.ai — partner (reseller) lines only: 52 lines in the file, 113 expected lines missing
DSail — partner (reseller) lines only: 52 lines in the file, 113 expected lines missing
Bidmachine — partner (reseller) lines only: 317 lines in the file, 400 expected lines missing

Invalid lines

pangleglobal.com, Account ID, DIRECT
inmobi.com, 75ef39c5a049470d8d04c124fda2e7ea, DIRECT, 83e75a7ae333ca9deskimi.com,2020000030, RESELLERfreewheel.tv, 1585681, RESELLERloopme.com, 11414, RESELLER, 6c8d5f95897a5a3bopera.com, pub592599355
inmobi.com, 75ef39c5a049470d8d04c124fda2e7ea, DIRECT, 83e75a7ae333ca9drubiconproject.com, 16824, RESELLERfreewheel.tv, 1585681, RESELLERopera.com, pub5925993551616, RESELLER, 55a0c5fd61378de3thebrave.
singularads, 548745, RESELLER
Domain "scanner.u-dictionary.com"

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

FAQ

Does u-dictionary.com have an app-ads.txt?

Yes — https://u-dictionary.com/app-ads.txt has 2,964 lines (checked 20 Oct 2026).

Which ad networks does u-dictionary.com work with?

Its app-ads.txt lists Google AdMob, Meta Audience Network, Mintegral, InMobi, Index Exchange, Vungle, AppLovin, Unity Ads, ironSource / LevelPlay, Smaato, PubMatic, Criteo and 18 more.

u-dictionary.com app-ads.txt check

Ad networks in u-dictionary.com/app-ads.txt

Invalid lines

FAQ

Does u-dictionary.com have an app-ads.txt?

Which ad networks does u-dictionary.com work with?

Is the app-ads.txt of u-dictionary.com correct?

Other checked domains

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