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.

free-tone.com app-ads.txt check

free-tone.com is missing out on higher CPMs: its app-ads.txt has 6 invalid lines. Buyers' crawlers skip invalid lines, so those sellers can't be verified.

Checked 19 Oct 2026. 6,077 lines, 4,383 unique records, 1,643 duplicates, 6 invalid lines, 32 ad networks detected.

Ad networks in free-tone.com/app-ads.txt

Google AdMob — accounts pub-1737620121468730, pub-3940256099942544: 2 lines in the file
InMobi — account 7de4928a50fa4893b5c40b956de7b911: 257 lines in the file, 15 expected lines missing
DT Exchange (Fyber) — account 207671: 400 lines in the file, 14 expected lines missing
Smaato — accounts 1100030846, 1100056999: 2 lines in the file
ironSource / LevelPlay — account 179725: 102 lines in the file, 24 expected lines missing
Ogury — account c494138c753b1a8b49b5534c4fd21916: 9 lines in the file, 9 expected lines missing
Unity Ads — account 20036: 161 lines in the file
MobileFuse — account 3781: 1 line in the file
Verve (PubNative) — accounts 1007785, 1008874: 400 lines in the file, 400 expected lines missing
PubMatic — account 165737: 1 line in the file
Liftoff Monetize (Vungle) — account 561e8d936b8d90f61a0014bd: 387 lines in the file, 4 expected lines missing
AppLovin — account fe0799d5cf1f15b9679d1ea8a37aac21: 36 lines in the file
Mintegral — account 26367: 400 lines in the file
Bidmachine — accounts 559-1, 559: 400 lines in the file, 65 expected lines missing
Magnite (Rubicon) — account 17622: 1 line in the file
Chartboost — partner (reseller) lines only: 400 lines in the file, 303 expected lines missing
Yandex Ads — partner (reseller) lines only: 138 lines in the file, 30 expected lines missing
VK Ads (myTarget) — partner (reseller) lines only: 76 lines in the file, 68 expected lines missing
BIGO Ads — partner (reseller) lines only: 400 lines in the file, 333 expected lines missing
Yango Ads — partner (reseller) lines only: 400 lines in the file, 400 expected lines missing
Bidease — partner (reseller) lines only: 37 lines in the file, 12 expected lines missing
BlueSea — partner (reseller) lines only: 22 lines in the file, 15 expected lines missing
Display.io — partner (reseller) lines only: 11 lines in the file, 21 expected lines missing
DSP Exchange — partner (reseller) lines only: 272 lines in the file, 289 expected lines missing
Maticoo (zMaticoo) — partner (reseller) lines only: 258 lines in the file, 186 expected lines missing
Monetrix — partner (reseller) lines only: 59 lines in the file, 34 expected lines missing
Prado — partner (reseller) lines only: 18 lines in the file, 9 expected lines missing
HyprMX — partner (reseller) lines only: 176 lines in the file, 193 expected lines missing
Start.io — partner (reseller) lines only: 86 lines in the file, 71 expected lines missing
Kidoz — partner (reseller) lines only: 14 lines in the file, 8 expected lines missing
CAS.ai — partner (reseller) lines only: 129 lines in the file, 36 expected lines missing
DSail — partner (reseller) lines only: 129 lines in the file, 36 expected lines missing

Invalid lines

se7en.es,212430,RESELLER,064bc410192443d8 aralego.com,par-9A2627866DA4BBE4F4AA4A67A3DDE686,RESELLER
rubiconproject.com,26192,RESELLER,0bfd66d529a55807 lunamedia.io,b82743ba2ddf4bcaab3d1d4f91b1330e,RESELLER,524ecb396915caaf algorix.co,60367,RESELLER,5b394c12fea27a1d
onlinemediasolutions.com,29556,RESELLER selectmedia.asia,645b5a31e427dc0a87094fc4,RESELLER,e365c871a27c655d yeahmobi.com,5135082,RESELLER
9dotsmedia.com,122262,RESELLER,45ff185b4c4e857d rubiconproject.com,26168,RESELLER,0bfd66d529a55807
openx.com, 537152826, RESELLER, 6a698e2ec38604c6 - for direct publishers only
adelement.com, 42001, RESELLER; mobimight.com, 75764, RESELLER

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

FAQ

Does free-tone.com have an app-ads.txt?

Yes — https://free-tone.com/app-ads.txt has 6,077 lines (checked 19 Oct 2026).

Which ad networks does free-tone.com work with?

Its app-ads.txt lists Google AdMob, InMobi, DT Exchange (Fyber), Smaato, ironSource / LevelPlay, Ogury, Unity Ads, MobileFuse, Verve (PubNative), PubMatic, Liftoff Monetize (Vungle), AppLovin and 20 more.

Is the app-ads.txt of free-tone.com correct?