USMLE Step 1 QBank: Step Aid
by Bikal Neupane · 6764781596
Most of the 124 lines in USMLE Step 1 QBank: Step Aid's app-ads.txt (dextromed.com) are RESELLER lines: 122 against 2 DIRECT, across 57 ad systems. 92 of 120 lines checked against sellers.json match; 11 name a seller ID the network does not list, 7 declare the wrong seller type. The file last changed on 7 October 2026.
Store data
- Rating
- —
- Installs
- —
- Category
- Education
- Contains ads
- —
Not published by Apple
app-ads.txt
- Domain
- dextromed.com
- Status
- Found (200)
- Lines
- 124
- DIRECT / RESELLER
- 2 / 122
- Parse errors
- 0
- Last fetched
- Oct 7, 2026
- Last changed
- Oct 7, 2026
sellers.json cross-check
124 lines checked
Verified
92
Errors
18
Warnings
11
- Seller ID not found 11
- RESELLER but publisher 7
- Seller type BOTH 10
- No sellers.json 1
- Unchecked 3
Declared supply tree
2 direct accounts across 2 direct sellers · 73 resellers buying from them · 49 not matched
| Direct seller | Accounts | Resold by | Issues |
|---|---|---|---|
| unity.com | 1 | 63 resellers: rubiconproject.com, pubmatic.com, triplelift.com … | 1 |
| google.com | 1 | — | 0 |
49 resellers, intermediary not matched to a direct seller of this app (the intermediary's domain is not a direct seller of this app: 28; sellers.json lists the account as a publisher, not an intermediary: 7; account not found in the ad system's sellers.json: 10; the ad system publishes no usable sellers.json: 1; not cross-checked yet: 3).
Seller IDs the networks do not list
11 lines of this app-ads.txt name an account ID that the ad system's sellers.json does not contain. Usually a stale line or a typo in the ID. How to fix it
| Line | Ad system | Account ID | Relationship |
|---|---|---|---|
| 9 | triplelift.com | 14705-eb | RESELLER |
| 11 | vidoomy.com | 8953515 | RESELLER |
| 21 | media.net | 8cu675n41 | RESELLER |
| 39 | appnexus.com | 6849 | RESELLER |
| 71 | google.com | pub-2923085774557613 | RESELLER |
| 73 | google.com | pub-3990748024667386 | RESELLER |
| 77 | ogury.com | 065d4ff5-a269-44be-9634-9d4d7af2dfc3 | RESELLER |
| 80 | dauup.com | 34222 | RESELLER |
| 87 | unity.com | 144856540 | DIRECT |
| 90 | onlinemediasolutions.com | 23120 | RESELLER |
| 99 | rubiconproject.com | 28341 | RESELLER |
New to these files? What is app-ads.txt · Network directory · Glossary
Last crawled Mon, Oct 12, 2026 10:17 AM. Data derived from the public store listing, the developer's app-ads.txt and the ad systems' sellers.json files.