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.

naturemobile.org app-ads.txt check

naturemobile.org achieves the best ad optimization: its app-ads.txt has no errors and matches what its 2 ad networks expect (100% of 37 lines).

Checked 19 Oct 2026. 39 lines, 39 unique records, 0 duplicates, 0 invalid lines, 9 ad networks detected.

Ad networks in naturemobile.org/app-ads.txt

Meta Audience Network — account 2521203381398831: 1 line in the file
AppLovin — account 4605dcba142cb55356f91ed20d8dfdb7: 36 lines in the file
Mintegral — partner (reseller) lines only: 12 lines in the file, 400 expected lines missing
Liftoff Monetize (Vungle) — partner (reseller) lines only: 13 lines in the file, 377 expected lines missing
Chartboost — partner (reseller) lines only: 11 lines in the file, 400 expected lines missing
DT Exchange (Fyber) — partner (reseller) lines only: 11 lines in the file, 400 expected lines missing
Yango Ads — partner (reseller) lines only: 35 lines in the file, 400 expected lines missing
Verve (PubNative) — partner (reseller) lines only: 10 lines in the file, 400 expected lines missing
Bidmachine — partner (reseller) lines only: 12 lines in the file, 400 expected lines missing

Corrected file: naturemobile.org app-ads.txt (fixed).

FAQ

Does naturemobile.org have an app-ads.txt?

Yes — https://naturemobile.org/app-ads.txt has 39 lines (checked 19 Oct 2026).

Which ad networks does naturemobile.org work with?

Its app-ads.txt lists Meta Audience Network, AppLovin, Mintegral, Liftoff Monetize (Vungle), Chartboost, DT Exchange (Fyber), Yango Ads, Verve (PubNative), Bidmachine.

Is the app-ads.txt of naturemobile.org correct?