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Duplicate lines in app-ads.txt

Updated Oct 7, 2026 · data from 12 App Store genres · top free + top grossing charts · US · iOS + Android

Short answerThe same line appears more than once. Duplicates are harmless for buyers but make the file harder to maintain and usually come from pasting partner blocks repeatedly.
520 of 883 ad-monetized top US apps in this index have this finding (59%)

Why it matters

Large files full of repeated lines hide the lines that matter.

How to fix it

  1. Remove duplicates; keep one copy of each line.

Apps with this finding

Each report lists the exact lines involved.

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Related

Based on the IAB Tech Lab ads.txt/app-ads.txt and sellers.json specifications. Numbers are automated observations of public files on the date above.