> The file is reachable but contains no line that follows the required format, so it authorizes no seller.

Source: https://appsupplyindex.com/fix/empty-app-ads-txt · Updated: 2026-10-07 · License: CC BY 4.0 (App Supply Index)

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[Learn](https://appsupplyindex.com/learn/) · How to fix

# app-ads.txt exists but has no valid lines

Updated Oct 7, 2026 · data from 12 App Store genres · top free + top grossing charts · US · iOS + Android

**Short answer:** The file is reachable but contains no line that follows the required format, so it authorizes no seller.

**9 of 883**
ad-monetized top US apps in this index have this finding (1%)

## Why it matters

An empty or unparseable file is treated like a missing one by buyers that enforce app-ads.txt.

## How to fix it

1. Add your partners' lines in the format: ad system domain, seller ID, DIRECT or RESELLER, and the optional certification authority ID.

## Apps with this finding

Each report lists the exact lines involved.

- [B1G+: Watch College Sports](https://appsupplyindex.com/app/ios-474679690) · Big Ten Network
- [BlazeTV: Pro-America](https://appsupplyindex.com/app/ios-1080655620) · Blaze Media LLC
- [Zwift: Indoor Cycling Fitness](https://appsupplyindex.com/app/ios-1134655040) · Zwift, Inc
- [Bebi: Baby Games for Preschool](https://appsupplyindex.com/app/ios-1474248135) · Bebi LLC
- [Dropout](https://appsupplyindex.com/app/ios-1380833056) · Connected Ventures
- [LazyFit: Workout For Beginners](https://appsupplyindex.com/app/ios-1669413773) · Next Vision Limited
- [FORM: Strength, Pilates, Gym](https://appsupplyindex.com/app/ios-1578636146) · SJC Companies, LLC
- [The Sculpt Society](https://appsupplyindex.com/app/ios-1481275761) · THE SCULPT SOCIETY LLC
- [beIN SPORTS CONNECT](https://appsupplyindex.com/app/ios-530061754) · beIN Media Group, LLC

## Related

- [What is app-ads.txt?](https://appsupplyindex.com/learn/what-is-app-ads-txt)
- [DIRECT vs RESELLER](https://appsupplyindex.com/learn/direct-vs-reseller)
- [How the index checks files](https://appsupplyindex.com/methodology)

Based on the [IAB Tech Lab
ads.txt/app-ads.txt](https://iabtechlab.com/ads-txt/) and [sellers.json](https://iabtechlab.com/sellers-json/)
specifications. Numbers are automated observations of public files on the date above.