> Yes, it's recommended. OWNERDOMAIN declares the domain of the company that owns the apps, which buyers can compare with the domains in ad systems' sellers.json for DIRECT accounts.

Source: https://appsupplyindex.com/fix/missing-ownerdomain · Updated: 2026-10-07 · License: CC BY 4.0 (App Supply Index)

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

# Should app-ads.txt include OWNERDOMAIN?

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

**Short answer:** Yes, it's recommended. OWNERDOMAIN declares the domain of the company that owns the apps, which buyers can compare with the domains in ad systems' sellers.json for DIRECT accounts.

**466 of 883**
ad-monetized top US apps in this index have this finding (53%)

## Why it matters

Without it, buyers can only guess which company a DIRECT account should belong to.

## How to fix it

1. Add one line: OWNERDOMAIN=<your company domain>.

Before

```
# (no variable)
```

After

```
OWNERDOMAIN=examplegames.com
```

## Apps with this finding

Each report lists the exact lines involved.

- [FREECABLE TV: News & TV Shows](https://appsupplyindex.com/app/ios-1152299107) · MixerBox Inc.
- [stats.fm for Spotify Music App](https://appsupplyindex.com/app/ios-1526912392) · StatsFM B.V.
- [Tape Measure & Ruler Арр](https://appsupplyindex.com/app/ios-1453537222) · Free Style Dev LLC
- [ColdTrace: Cold Case Mystery](https://appsupplyindex.com/app/ios-6762513021) · Saclic Studio
- [Clean Manager: Storage Cleaner](https://appsupplyindex.com/app/ios-1579881271) · Quiet
- [PictureThis - Plant Identifier](https://appsupplyindex.com/app/ios-1252497129) · Glority Global Group Ltd.
- [Rock Identifier: Stone ID](https://appsupplyindex.com/app/ios-1546796934) · Next Vision Limited
- [Picture Insect: Bug Identifier](https://appsupplyindex.com/app/ios-1461694973) · Next Vision Limited
- [Reverse Audio](https://appsupplyindex.com/app/ios-1254981556) · Nobutaka Yuasa
- [Picture Mushroom: Identifier](https://appsupplyindex.com/app/ios-1474578078) · Next Vision Limited
- [PlantIn: Plant Identifier・Care](https://appsupplyindex.com/app/ios-1527399597) · Vortemol Limited
- [ShortsWave: Watch Drama Series](https://appsupplyindex.com/app/ios-6478104173) · HALOFUN PTE. LTD.

[All apps →](https://appsupplyindex.com/apps)

## 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.