Ad system
oko.uk
Most of the 59,309 apps that declare oko.uk reach it through a reseller: 87% have a RESELLER line, 72% a DIRECT one (6,848 files, 3,586 of them through bigo.sg's account). Of 20,161 lines checked against its sellers.json (444 sellers), 43% match, 5.4% name an unlisted account and 16% declare the wrong seller type. 72% of the lines carry the certification ID b3511ffcafb23a32.
- Apps declaring it
- 59,309
- Sellers in sellers.json
- 444
- Lines verified
- 43%
- Lines with errors
- 4,290
- Avg. supply path score
- 50.3 / 100
42,434 DIRECT · 51,747 RESELLER
0% confidential
8,752 of 20,232 checked lines
20,232 lines in total
58,450 apps scored
App counts, the sellers.json breakdown and the directory ranking are as of , recomputed daily (the same numbers as the directory). Line counts are recounted every 10 minutes. sellers.json last read 13 October 2026. The supply path score sums up how short and clean the declared paths are, 0 to 100 (how it is computed).
How to add oko.uk to app-ads.txt
One line per account, in the app-ads.txt at the root of the domain your App Store and Google Play listings name as the developer website.
oko.uk, YOUR_ACCOUNT_ID, DIRECT, b3511ffcafb23a32
oko.uk, YOUR_ACCOUNT_ID, RESELLER, b3511ffcafb23a32- Field 1:
oko.uk, the domain oko.uk uses in app-ads.txt. - Field 2: your account ID with oko.uk. It must equal the
seller_idin oko.uk's sellers.json. - Field 3: DIRECT if you hold the account, RESELLER if a partner holds it and sells your inventory. DIRECT vs RESELLER
- Field 4 (optional):
b3511ffcafb23a32, the certification authority ID on 72% of the lines naming oko.uk.
sellers.json at a glance
- Status
- Published
- Sellers listed
- 444
- Confidential
- 0 (0%)
- Passthrough
- 0
- Removed, last 30 days
- 0
- Last read
- Oct 13, 2026
- PUBLISHER315
- INTERMEDIARY76
- BOTH53
Cross-check of lines naming oko.uk
- Verified 8,752
- Seller ID not found 1,093
- DIRECT but intermediary 1,744
- RESELLER but publisher 1,453
- Seller type BOTH 7,190
- Confidential seller 0
- No sellers.json 0
- Unchecked 0
Every line naming oko.uk is looked up in its sellers.json. What each status means
Common errors with oko.uk lines
-
Seller type BOTH
7,190 lines
The account is listed as BOTH, so sellers.json alone cannot tell a buyer which relationship applies. Nothing to fix on your side; buyers usually look at the seller's domain.
-
DIRECT but intermediary
1,744 lines
If a partner holds this account and resells your inventory, the line should say RESELLER. If the account is yours, ask oko.uk to list it as PUBLISHER.
-
RESELLER but publisher
1,453 lines
If the account is yours, declare it DIRECT. If a partner holds it, ask oko.uk why the account is listed as PUBLISHER.
-
Seller ID not found
1,093 lines
Ask oko.uk for the account ID it lists for you in its sellers.json, correct the line, or remove it if you no longer work with them. Buyers that check sellers.json drop these paths.
Intermediaries most declared as RESELLER
Accounts on oko.uk that its sellers.json lists as INTERMEDIARY or BOTH, by the number of app-ads.txt files declaring them. Confidential sellers are left out.
| Seller domain | Type | Files |
|---|---|---|
| bigo.sg | BOTH | 3,586 |
| ionvogroup.com | INTERMEDIARY | 2,669 |
| bidmachine.io | INTERMEDIARY | 1,469 |
| zmaticoo.com | INTERMEDIARY | 960 |
| videoheroes.tv | BOTH | 646 |
| iion.io | INTERMEDIARY | 629 |
| blasto.ai | INTERMEDIARY | 583 |
| boldcollective.co | INTERMEDIARY | 499 |
Apps that declare oko.uk
| App | Store | Relationship | Status |
|---|---|---|---|
| Android | RESELLER | Live | |
| Android | DIRECT + RESELLER | Live | |
| iOS | DIRECT + RESELLER | Live | |
| Android | DIRECT + RESELLER | Live | |
| iOS | DIRECT + RESELLER | Live | |
| Android | DIRECT + RESELLER | Live | |
| Android | DIRECT + RESELLER | Live | |
| Android | DIRECT + RESELLER | Live | |
| iOS | DIRECT + RESELLER | Live | |
| Android | DIRECT | Live | |
| Android | DIRECT + RESELLER | Live | |
| Android | RESELLER | Live | |
| Android | RESELLER | Live | |
| iOS | RESELLER | Live | |
| Android | DIRECT + RESELLER | Live | |
| Android | DIRECT + RESELLER | Live | |
| Android | DIRECT + RESELLER | Live | |
| Android | DIRECT + RESELLER | Live | |
| Android | DIRECT + RESELLER | Live | |
| Android | RESELLER | Live |
Questions about oko.uk
Does oko.uk publish a sellers.json?
Yes. Its file at https://ppa.insticator.com/v1/sellers.json listed 444 sellers when we last read it on 13 October 2026: 315 publishers, 76 intermediaries and 53 listed as both; 0% are confidential.
How many apps declare oko.uk in app-ads.txt?
59,309 apps in Stoqlab's data (delisted apps included) declare oko.uk: 42,434 with at least one DIRECT line and 51,747 with at least one RESELLER line, across 6,848 app-ads.txt files, as of 14 October 2026 (recounted daily).
What is the certification authority ID for oko.uk?
72% of the app-ads.txt lines naming oko.uk carry "b3511ffcafb23a32" in the fourth field. The field is optional; the IAB Tech Lab ads.txt 1.1 specification says identifiers in sellers.json supersede it, so a missing or different value does not make a line invalid.
Why do oko.uk lines fail verification?
Of 20,232 lines naming oko.uk, 4,290 contradict its sellers.json. The most common case is "DIRECT but intermediary", on 1,744 lines. If a partner holds this account and resells your inventory, the line should say RESELLER. If the account is yours, ask oko.uk to list it as PUBLISHER.
Not sure whether your line should say DIRECT or RESELLER? DIRECT vs RESELLER in app-ads.txt
Sources: the public app-ads.txt files of tracked apps and the sellers.json of oko.uk. Something wrong? Tell us.