Ad system
concert.io
630 apps across 438 app-ads.txt files declare concert.io; 76% hold a DIRECT account and 24% list it as a RESELLER. Its sellers.json lists 104 sellers, and 98% of the 438 lines we checked against it match.
- Apps declaring it
- 630
- Sellers in sellers.json
- 104
- Lines verified
- 98%
- Lines with errors
- 8
- Avg. supply path score
- 56.3 / 100
481 DIRECT · 149 RESELLER
0% confidential
427 of 438 checked lines
438 lines in total
620 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 concert.io 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.
concert.io, YOUR_ACCOUNT_ID, DIRECT
concert.io, YOUR_ACCOUNT_ID, RESELLER- Field 1:
concert.io, the domain concert.io uses in app-ads.txt. - Field 2: your account ID with concert.io. It must equal the
seller_idin concert.io'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): a certification authority ID. Most lines naming concert.io carry none, or different ones, so we do not suggest one.
sellers.json at a glance
- Status
- Published
- Sellers listed
- 104
- Confidential
- 0 (0%)
- Passthrough
- 0
- Removed, last 30 days
- 0
- Last read
- Oct 13, 2026
- PUBLISHER95
- INTERMEDIARY6
- BOTH3
Cross-check of lines naming concert.io
- Verified 427
- Seller ID not found 6
- DIRECT but intermediary 2
- RESELLER but publisher 0
- Seller type BOTH 3
- Confidential seller 0
- No sellers.json 0
- Unchecked 0
Every line naming concert.io is looked up in its sellers.json. What each status means
Common errors with concert.io lines
-
Seller ID not found
6 lines
Ask concert.io 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.
-
Seller type BOTH
3 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
2 lines
If a partner holds this account and resells your inventory, the line should say RESELLER. If the account is yours, ask concert.io to list it as PUBLISHER.
Apps that declare concert.io
| App | Store | Relationship | Status |
|---|---|---|---|
| iOS | DIRECT | Live | |
| iOS | DIRECT | Live | |
| Android | RESELLER | Live | |
| iOS | DIRECT | Live | |
| iOS | DIRECT | Live | |
| iOS | DIRECT | Live | |
| iOS | DIRECT | Live | |
| Android | DIRECT | Live | |
| iOS | DIRECT | Live | |
| iOS | DIRECT | Live | |
| iOS | DIRECT | Live | |
| iOS | DIRECT | Live | |
| iOS | DIRECT | Live | |
| iOS | DIRECT | Live | |
| iOS | DIRECT | Live | |
| iOS | DIRECT | Live | |
| iOS | DIRECT | Live | |
| iOS | DIRECT | Live | |
| iOS | DIRECT | Live | |
| Android | RESELLER | Live |
Questions about concert.io
Does concert.io publish a sellers.json?
Yes. Its file at https://concert.io/sellers.json listed 104 sellers when we last read it on 13 October 2026: 95 publishers, 6 intermediaries and 3 listed as both; 0% are confidential.
How many apps declare concert.io in app-ads.txt?
630 apps in Stoqlab's data (delisted apps included) declare concert.io: 481 with at least one DIRECT line and 149 with at least one RESELLER line, across 438 app-ads.txt files, as of 14 October 2026 (recounted daily).
Why do concert.io lines fail verification?
Of 438 lines naming concert.io, 8 contradict its sellers.json. The most common case is "Seller ID not found", on 6 lines. Ask concert.io 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.
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 concert.io. Something wrong? Tell us.