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.

photowidget-523a6.web.app app-ads.txt check

photowidget-523a6.web.app achieves the best ad optimization: its app-ads.txt has no errors and matches what its 4 ad networks expect (100% of 4 lines).

Checked 20 Oct 2026. 32 lines, 32 unique records, 0 duplicates, 0 invalid lines, 4 ad networks detected.

Ad networks in photowidget-523a6.web.app/app-ads.txt

Google AdMob — accounts pub-6363109307720154, pub-3940256099942544: 2 lines in the file
PubMatic — account 160565: 1 line in the file
Meta Audience Network — account 188289049375152: 1 line in the file
Magnite (Rubicon) — account 22884: 1 line in the file

Corrected file: photowidget-523a6.web.app app-ads.txt (fixed).

FAQ

Does photowidget-523a6.web.app have an app-ads.txt?

Yes — https://photowidget-523a6.web.app/app-ads.txt has 32 lines (checked 20 Oct 2026).

Which ad networks does photowidget-523a6.web.app work with?

Its app-ads.txt lists Google AdMob, PubMatic, Meta Audience Network, Magnite (Rubicon).

Is the app-ads.txt of photowidget-523a6.web.app correct?