Stoqlab

Ad system

undertone.com

Most of the 143,855 apps that declare undertone.com reach it through a reseller: 100% have a RESELLER line, 3.9% a DIRECT one (21,059 files, 16,264 of them through unity.com's account). Of 40,769 lines checked against its sellers.json (139 sellers), 66% match, 15% name an unlisted account and 18% declare the wrong seller type.

Check an app-ads.txt Open in dashboard
Apps declaring it
143,855

5,626 DIRECT · 143,433 RESELLER

Sellers in sellers.json
139

0% confidential

Lines verified
66%

27,021 of 40,893 checked lines

Lines with errors
13,414

40,893 lines in total

Avg. supply path score
51.1 / 100

141,660 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 undertone.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.

undertone.com, YOUR_ACCOUNT_ID, DIRECT
undertone.com, YOUR_ACCOUNT_ID, RESELLER
  • Field 1: undertone.com, the domain undertone.com uses in app-ads.txt.
  • Field 2: your account ID with undertone.com. It must equal the seller_id in undertone.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): a certification authority ID. Most lines naming undertone.com carry none, or different ones, so we do not suggest one.

sellers.json at a glance

Status
Published
Sellers listed
139
Confidential
0 (0%)
Passthrough
0
Removed, last 30 days
0
Last read
Oct 13, 2026
  • PUBLISHER110
  • INTERMEDIARY21
  • BOTH8

Cross-check of lines naming undertone.com

  • Verified 27,021
  • Seller ID not found 6,173
  • DIRECT but intermediary 16
  • RESELLER but publisher 7,225
  • Seller type BOTH 458
  • Confidential seller 0
  • No sellers.json 0
  • Unchecked 0

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

Common errors with undertone.com lines

  • RESELLER but publisher 7,225 lines

    If the account is yours, declare it DIRECT. If a partner holds it, ask undertone.com why the account is listed as PUBLISHER.

  • Seller ID not found 6,173 lines

    Ask undertone.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.

  • Seller type BOTH 458 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 16 lines

    If a partner holds this account and resells your inventory, the line should say RESELLER. If the account is yours, ask undertone.com to list it as PUBLISHER.

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

Intermediaries most declared as RESELLER

Accounts on undertone.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
unity.com INTERMEDIARY 16,264
fyber.com INTERMEDIARY 8,628
sendtonews.com INTERMEDIARY 593
unrulymedia.com INTERMEDIARY 474
hcodemedia.com BOTH 106
nextmillennium.io INTERMEDIARY 88
nglcollective.com BOTH 45

Apps that declare undertone.com

AppStoreRelationshipStatus
Castle Clash: World Ruler Castle Clash: World Ruler
 Android RESELLER Live
Wattpad - Read & Write Stories Wattpad - Read & Write Stories
 Android RESELLER Live
BeautyPlus-Selfie Photo Editor BeautyPlus-Selfie Photo Editor
 Android RESELLER Live
Akinator Akinator
 Android RESELLER Live
Period Calendar Period Tracker Period Calendar Period Tracker
 Android RESELLER Live
Extreme Car Driving Simulator Extreme Car Driving Simulator
 Android RESELLER Live
Last Day on Earth: Survival Last Day on Earth: Survival
 Android RESELLER Live
Jetpack Joyride Jetpack Joyride
 Android RESELLER Live
QR & Barcode Scanner QR & Barcode Scanner
 Android RESELLER Live
Roku Remote (Official) Roku Remote (Official)
 Android DIRECT + RESELLER Live
Camera360 :Photo Editor&Selfie Camera360 :Photo Editor&Selfie
 Android RESELLER Live
Hill Climb Racing 2 Hill Climb Racing 2
 Android DIRECT + RESELLER Live
Photo Editor - Polish Photo Editor - Polish
 Android RESELLER Live
Toon Blast Toon Blast
 Android DIRECT + RESELLER Live
Pocket FM: Audio Dramas Pocket FM: Audio Dramas
 Android DIRECT + RESELLER Live
WEBTOON: Manga, Comics, Manhwa WEBTOON: Manga, Comics, Manhwa
 Android RESELLER Live
Crossy Road Crossy Road
 Android RESELLER Live
Mortal Kombat Mortal Kombat
 Android RESELLER Live
World of Tanks Blitz™ World of Tanks Blitz™
 Android RESELLER Live
Shadow Fight 3 - RPG fighting Shadow Fight 3 - RPG fighting
 Android RESELLER Live

Questions about undertone.com

Does undertone.com publish a sellers.json?

Yes. Its file at https://undertone.com/sellers.json listed 139 sellers when we last read it on 13 October 2026: 110 publishers, 21 intermediaries and 8 listed as both; 0% are confidential.

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

143,855 apps in Stoqlab's data (delisted apps included) declare undertone.com: 5,626 with at least one DIRECT line and 143,433 with at least one RESELLER line, across 21,059 app-ads.txt files, as of 14 October 2026 (recounted daily).

Why do undertone.com lines fail verification?

Of 40,893 lines naming undertone.com, 13,414 contradict its sellers.json. The most common case is "RESELLER but publisher", on 7,225 lines. If the account is yours, declare it DIRECT. If a partner holds it, ask undertone.com why the account is listed 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 undertone.com. Something wrong? Tell us.