IELTS Speaking Mastery
by Linh Nguyen · 1492428588
The app-ads.txt behind IELTS Speaking Mastery (app.ieltspracticeonline.com) declares 22 DIRECT lines and 43 RESELLER lines naming 37 ad systems. 23 of the 57 lines checked name a seller ID the network's sellers.json does not list, so buyers that check drop those paths. The file last changed on 4 October 2026; the same file covers 4 apps of this developer.
Store data
- Rating
- 4.82
- Installs
- —
- Category
- Education
- Contains ads
- —
17 ratings
Not published by Apple
app-ads.txt
- Domain
- app.ieltspracticeonline.com
- Status
- Found (200)
- Lines
- 65
- DIRECT / RESELLER
- 22 / 43
- Parse errors
- 2
- Last fetched
- Oct 10, 2026
- Last changed
- Oct 4, 2026
sellers.json cross-check
65 lines checked
Verified
23
Errors
29
Warnings
5
- Seller ID not found 23
- DIRECT but intermediary 6
- Seller type BOTH 3
- Confidential seller 2
- Unchecked 8
Declared supply tree
22 direct accounts across 15 direct sellers · 17 resellers buying from them · 26 not matched
| Direct seller | Accounts | Resold by | Issues |
|---|---|---|---|
| uis.mobfox.com | 1 | 2 resellers: xad.com, pubmatic.com | 1 |
| reforge.in | 2 | 1 reseller: pubmatic.com | 0 |
| google.com | 3 | — | 0 |
| smaato.com | 3 | — | 2 |
| pubnative.net | 2 | — | 2 |
| triplelift.com | 2 | — | 1 |
| aps.amazon.com | 1 | — | 1 |
| chocolateplatform.com | 1 | — | 1 |
| media.net | 1 | — | 1 |
| openx.com | 1 | — | 1 |
| pubmatic.com | 1 | — | 1 |
| rhythmone.com | 1 | — | 0 |
| + 3 more direct sellers in the full tree | |||
26 resellers, intermediary not matched to a direct seller of this app (account not found in the ad system's sellers.json: 16; not cross-checked yet: 4; the intermediary's domain is not a direct seller of this app: 4; the seller is confidential in sellers.json: 2).
Seller IDs the networks do not list
23 lines of this app-ads.txt name an account ID that the ad system's sellers.json does not contain; the first 15 in file order. Usually a stale line or a typo in the ID. How to fix it
| Line | Ad system | Account ID | Relationship |
|---|---|---|---|
| 4 | uis.mobfox.com | SM_631 | DIRECT |
| 6 | appnexus.com | 2637 | RESELLER |
| 7 | appnexus.com | 2850 | RESELLER |
| 8 | openx.com | 539249210 | RESELLER |
| 10 | rubiconproject.com | 17494 | RESELLER |
| 12 | inmobi.com | a5e661acdc384e91a79a58eb3418e99f | RESELLER |
| 25 | inmobi.com | fe4db13744124582a6a2b18964560ce7 | RESELLER |
| 29 | rubiconproject.com | 21526 | RESELLER |
| 30 | rubiconproject.com | 21938 | RESELLER |
| 31 | synacor.com | 82377 | RESELLER |
| 32 | advertising.com | 19623 | RESELLER |
| 33 | appnexus.com | 9316 | RESELLER |
| 39 | video.unrulymedia.com | 905992537 | RESELLER |
| 42 | loopme.com | 9722 | RESELLER |
| 50 | indexexchange.com | 194730 | RESELLER |
More apps from Linh Nguyen
New to these files? What is app-ads.txt · Network directory · Glossary
Last crawled Fri, Oct 9, 2026 7:07 AM. Data derived from the public store listing, the developer's app-ads.txt and the ad systems' sellers.json files.