Tandem: Language exchange
by Tripod Technology GmbH · net.tandem
Most of the 82 lines in Tandem: Language exchange's app-ads.txt (tandem.net) are RESELLER lines: 70 against 12 DIRECT, across 40 ad systems. 37 of 75 lines checked against sellers.json match; 20 name a seller ID the network does not list, 14 declare the wrong seller type. The file last changed on 3 October 2026; the same file covers 2 apps of this developer.
Store data
- Rating
- 4.08
- Installs
- 10M+
- Category
- Education
- Contains ads
- Yes
416,530 ratings
Offers in-app purchases
app-ads.txt
- Domain
- tandem.net
- Status
- Found (200)
- Lines
- 82
- DIRECT / RESELLER
- 12 / 70
- Parse errors
- 7
- Last fetched
- Oct 12, 2026
- Last changed
- Oct 3, 2026
sellers.json cross-check
82 lines checked
Verified
37
Errors
34
Warnings
5
- Seller ID not found 20
- DIRECT but intermediary 6
- RESELLER but publisher 8
- Seller type BOTH 4
- No sellers.json 1
- Unchecked 6
Declared supply tree
12 direct accounts across 9 direct sellers · 26 resellers buying from them · 44 not matched
| Direct seller | Accounts | Resold by | Issues |
|---|---|---|---|
| google.com | 2 | 5 resellers: openx.com, smartadserver.com, smaato.com … | 1 |
| onetag.com | 2 | 4 resellers: smartadserver.com, rubiconproject.com, pubmatic.com … | 2 |
| inmobi.com | 1 | 4 resellers: ssp.e-volution.ai, pubmatic.com, showheroes.com … | 1 |
| uis.mobfox.com | 1 | 2 resellers: xad.com, pubmatic.com | 1 |
| triplelift.com | 2 | — | 1 |
| media.net | 1 | — | 1 |
| openx.com | 1 | — | 1 |
| pubmatic.com | 1 | — | 1 |
| rubiconproject.com | 1 | — | 1 |
44 resellers, intermediary not matched to a direct seller of this app (the intermediary's domain is not a direct seller of this app: 13; not cross-checked yet: 6; account not found in the ad system's sellers.json: 16; sellers.json lists the account as a publisher, not an intermediary: 8; the ad system publishes no usable sellers.json: 1).
Seller IDs the networks do not list
20 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 |
|---|---|---|---|
| 7 | rubiconproject.com | 17430 | RESELLER |
| 21 | indexexchange.com | 191333 | RESELLER |
| 24 | google.com | pub-3940256099942544 | DIRECT |
| 25 | uis.mobfox.com | SM_808 | DIRECT |
| 26 | appnexus.com | 2637 | RESELLER |
| 27 | appnexus.com | 2850 | RESELLER |
| 28 | openx.com | 539249210 | RESELLER |
| 30 | rubiconproject.com | 17494 | RESELLER |
| 32 | inmobi.com | e62885a0ba0443cd98a6a4827f75f80a | DIRECT |
| 43 | smartadserver.com | 4194-OB | RESELLER |
| 52 | synacor.com | 82377 | RESELLER |
| 53 | onetag.com | 72b20ec05ea6e86 | RESELLER |
| 55 | inmobi.com | fe4db13744124582a6a2b18964560ce7 | RESELLER |
| 59 | rubiconproject.com | 24484 | RESELLER |
| 62 | rubiconproject.com | 23986 | RESELLER |
New to these files? What is app-ads.txt · Network directory · Glossary
Last crawled Mon, Oct 12, 2026 10:27 AM. Data derived from the public store listing, the developer's app-ads.txt and the ad systems' sellers.json files.