What is app-ads.txt?

app-ads.txt is a mechanism for app developers to explicitly declare the authorized sellers of their ad inventory, and is an authentication method proposed by the IAB (Interactive Advertising Bureau).
It aims to prevent ad fraud and create an environment where advertisers can place ads with confidence.

If you publish apps on the App Store or Google Play, many ad networks recommend or require the presence of an app-ads.txt file.

Why app-ads.txt is necessary for mobile ads

To maximize ad revenue from your app, ad networks must be able to verify that they are dealing with an authorized seller.
If you do not publish an app-ads.txt file, the following may occur:

• Ad delivery may be restricted
• Ad revenue may decrease
• Some networks may not pass review

Publishing app-ads.txt correctly helps stabilize ad revenue.

What you need to publish app-ads.txt

To use app-ads.txt, prepare the following:

1. Own a custom domain
   app-ads.txt must be published at "https://your-domain/app-ads.txt".

2. Have an environment to host on your domain
   You need to place app-ads.txt on a web server so it is accessible externally.

3. Reflect each ad network's required format correctly
   Example:

   google.com, pub-0000000000000000, DIRECT, f08c47fec0942fa0
   

How to configure app-ads.txt on Launchfy.support

Using Launchfy.support lets you publish app-ads.txt easily without building your own web server.

1. Enable hosting on the "Domain & Language Settings" screen
   A dedicated domain for you will be issued automatically.

2. Open "Mobile Ads (app-ads.txt)" from the menu

3. Enter the app-ads.txt content provided by your ad networks and save

4. Visit the published URL (e.g.:
   https://{あなたのサブドメイン}.launchfy.site/app-ads.txt
   ) and confirm the content displays correctly.

That’s all—your app-ads.txt will be published!

If needed, we can provide a shorter version or add examples for specific ad networks.