Stoqlab

Ad system

groundtruth.com

Most of the 102,150 apps that declare groundtruth.com reach it through a reseller: 100% have a RESELLER line, 0% a DIRECT one (13,318 files, 403 of them through Smaato's account). 97% of the 13,734 lines checked name an account its sellers.json (37 sellers) does not list. 1 seller left its sellers.json in the last 30 days.

Check an app-ads.txt Open in dashboard
Apps declaring it
102,150

36 DIRECT · 102,144 RESELLER

Sellers in sellers.json
37

0% confidential

Lines verified
2.9%

416 of 14,337 checked lines

Lines with errors
13,921

14,337 lines in total

Avg. supply path score
49.0 / 100

106,486 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 groundtruth.com 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.

groundtruth.com, YOUR_ACCOUNT_ID, DIRECT, 81cbf0a75a5e0e9a
groundtruth.com, YOUR_ACCOUNT_ID, RESELLER, 81cbf0a75a5e0e9a
  • Field 1: groundtruth.com, the domain groundtruth.com uses in app-ads.txt.
  • Field 2: your account ID with groundtruth.com. It must equal the seller_id in groundtruth.com'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): 81cbf0a75a5e0e9a, the certification authority ID on 99% of the lines naming groundtruth.com.

sellers.json at a glance

Status
Published
Sellers listed
37
Confidential
0 (0%)
Passthrough
0
Removed, last 30 days
1
Last read
Oct 13, 2026
  • PUBLISHER15
  • INTERMEDIARY22
  • BOTH0

Cross-check of lines naming groundtruth.com

  • Verified 416
  • Seller ID not found 13,921
  • DIRECT but intermediary 0
  • RESELLER but publisher 0
  • Seller type BOTH 0
  • Confidential seller 0
  • No sellers.json 0
  • Unchecked 0

Every line naming groundtruth.com is looked up in its sellers.json. What each status means

Common errors with groundtruth.com lines

  • Seller ID not found 13,921 lines

    Ask groundtruth.com 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.

Common app-ads.txt errors and how to fix them

Intermediaries most declared as RESELLER

Accounts on groundtruth.com 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 domainTypeFiles
smaato.com INTERMEDIARY 403
smartadserver.com INTERMEDIARY 3

Apps that declare groundtruth.com

AppStoreRelationshipStatus
Trivia Crack: Brain Quiz Games Trivia Crack: Brain Quiz Games
 Android RESELLER Live
Geometry Dash Lite Geometry Dash Lite
 Android RESELLER Live
Screen Recorder - XRecorder Screen Recorder - XRecorder
 Android RESELLER Live
Hungry Shark Evolution Hungry Shark Evolution
 Android RESELLER Live
Plants vs Zombies™ 2 Plants vs Zombies™ 2
 Android RESELLER Live
B612 AI Photo&Video Editor B612 AI Photo&Video Editor
 Android RESELLER Live
Stumble Guys Stumble Guys
 Android RESELLER Live
Gangstar Vegas: World of Crime Gangstar Vegas: World of Crime
 Android RESELLER Live
Fishdom Fishdom
 Android RESELLER Live
Badoo Dating App: Meet & Date Badoo Dating App: Meet & Date
 Android RESELLER Live
Photo Lab Picture Editor & Art Photo Lab Picture Editor & Art
 Android RESELLER Live
Words of Wonders: Crossword Words of Wonders: Crossword
 Android RESELLER Live
Vita Mahjong Vita Mahjong
 Android RESELLER Live
Hago- Party, Chat & Games Hago- Party, Chat & Games
 Android RESELLER Live
Angry Birds 2 Angry Birds 2
 Android RESELLER Live
JOOX Music - AI Player JOOX Music - AI Player
 Android RESELLER Live
WPS Office-PDF, Word, Sheet WPS Office-PDF, Word, Sheet
 Android RESELLER Live
Brain Out®: Can you pass it? Brain Out®: Can you pass it?
 Android RESELLER Live
Remini - AI Photo Enhancer Remini - AI Photo Enhancer
 Android RESELLER Live
Idle Miner Tycoon: Gold Games Idle Miner Tycoon: Gold Games
 Android RESELLER Live

Questions about groundtruth.com

Does groundtruth.com publish a sellers.json?

Yes. Its file at https://www.groundtruth.com/sellers.json listed 37 sellers when we last read it on 13 October 2026: 15 publishers, 22 intermediaries and 0 listed as both; 0% are confidential.

How many apps declare groundtruth.com in app-ads.txt?

102,150 apps in Stoqlab's data (delisted apps included) declare groundtruth.com: 36 with at least one DIRECT line and 102,144 with at least one RESELLER line, across 13,318 app-ads.txt files, as of 13 October 2026 (recounted daily).

What is the certification authority ID for groundtruth.com?

99% of the app-ads.txt lines naming groundtruth.com carry "81cbf0a75a5e0e9a" 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 groundtruth.com lines fail verification?

Of 14,337 lines naming groundtruth.com, 13,921 contradict its sellers.json. The most common case is "Seller ID not found", on 13,921 lines. Ask groundtruth.com 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 groundtruth.com. Something wrong? Tell us.