Duolingo: Language Lessons
by Duolingo · 570060128
Store data
- Rating
- 4.72
- Installs
- —
- Category
- Education
- Contains ads
- Yes
5,497,633 ratings
Not published by Apple
Offers in-app purchases
app-ads.txt
- Domain
- duolingo.com
- Status
- Found (200)
- Lines
- 504
- DIRECT / RESELLER
- 25 / 479
- OWNERDOMAIN
- duolingo.com
- MANAGERDOMAIN
- aditude.io
- Parse errors
- 63
- Last fetched
- Oct 10, 2026
- Last changed
- Oct 3, 2026
sellers.json cross-check
504 lines checked
Verified
417
Errors
33
Warnings
50
- Seller ID not found 14
- DIRECT but intermediary 11
- RESELLER but publisher 8
- Seller type BOTH 45
- Confidential seller 1
- No sellers.json 4
- Unchecked 4
Declared supply tree
25 direct accounts across 21 direct sellers · 288 resellers buying from them · 191 not matched
| Direct seller | Accounts | Resold by | Issues |
|---|---|---|---|
| unity.com | 1 | 127 resellers: pubmatic.com, openx.com, pubnative.net … | 0 |
| vungle.com | 1 | 92 resellers: pubnative.net, video.unrulymedia.com, pubmatic.com … | 0 |
| cpmstar.com | 1 | 21 resellers: pubmatic.com, smartadserver.com, sharethrough.com … | 0 |
| risecodes.com | 1 | 15 resellers: sharethrough.com, video.unrulymedia.com, yieldmo.com … | 1 |
| tagoras.io | 1 | 5 resellers: pubmatic.com, media.net, gitberry.com … | 0 |
| google.com | 2 | 3 resellers: pubmatic.com, video.unrulymedia.com … | 0 |
| aps.amazon.com | 1 | 2 resellers: media.net, indexexchange.com | 1 |
| gumgum.com | 1 | 2 resellers: pubmatic.com, openx.com | 0 |
| media.net | 1 | 2 resellers: pubmatic.com, openx.com | 1 |
| sharethrough.com | 1 | 2 resellers: pubmatic.com, openx.com | 1 |
| smartadserver.com | 1 | 2 resellers: pubmatic.com, openx.com | 1 |
| aditude.io | 1 | 1 reseller: video.unrulymedia.com | 0 |
| + 9 more direct sellers in the full tree | |||
191 resellers, intermediary not matched to a direct seller of this app (not cross-checked yet: 2; account not found in the ad system's sellers.json: 13; the intermediary's domain is not a direct seller of this app: 163; the ad system publishes no usable sellers.json: 4; sellers.json lists the account as a publisher, not an intermediary: 8; the seller is confidential in sellers.json: 1).
More apps from Duolingo
New to these files? What is app-ads.txt · Network directory · Glossary
Last crawled Sat, Oct 10, 2026 4:56 AM. Data derived from the public store listing, the developer's app-ads.txt and the ad systems' sellers.json files.