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.

chensinit.github.io app-ads.txt check

chensinit.github.io is missing out on higher CPMs: its app-ads.txt has 3 invalid lines. Buyers' crawlers skip invalid lines, so those sellers can't be verified.

Checked 21 Oct 2026. 4 lines, 1 unique records, 0 duplicates, 3 invalid lines, 1 ad network detected.

Ad networks in chensinit.github.io/app-ads.txt

Google AdMob — account pub-7527760791973061: 1 line in the file

Invalid lines

---
permalink: /app-ads.txt
---

Corrected file: chensinit.github.io app-ads.txt (fixed).

FAQ

Does chensinit.github.io have an app-ads.txt?

Yes — https://chensinit.github.io/app-ads.txt has 4 lines (checked 21 Oct 2026).

Which ad networks does chensinit.github.io work with?

Its app-ads.txt lists Google AdMob.

Is the app-ads.txt of chensinit.github.io correct?