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AppsFlyer controversies

Controversies tied to this brand in public sources. A listing is not a finding of fault.

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  1. 2026

    Reported malware in an AppsFlyer software development kit

    Reference material reports that malware was found in an AppsFlyer software development kit and replaced Bitcoin wallet addresses. The incident’s provenance, affected versions, remediation, and final impact are not sufficiently documented in the supplied material.

    Source

  2. 2025

    NOYB privacy lawsuit involving TikTok data transfers

    NOYB brought a complaint alleging that AppsFlyer’s data practices connected with TikTok involved unlawful tracking of European users’ private shopping preferences and transfers of personal information without a sufficient legal basis. The matter places the company’s attribution and data-processing model under European privacy scrutiny; the available reference does not establish a final judgment.

    Source

  3. 2021

    Class-action lawsuit alleges Flo Health and advertisers misused sensitive app data

    Lawsuit filed

    Madeline Kiss filed a putative class-action lawsuit against Flo Health and advertiser defendants, alleging that the companies exchanged confidential information and that Flo Health provided users’ intimate health details to third parties. These are allegations in the complaint, not a court determination.

    Source excerpt

    • On Monday, Madeline Kiss filed a putative class-action lawsuit against Flo Health, Inc., and additional advertiser defendants including Google, LLC, Facebook, Inc., Appsflyer, Inc., and Flurry, Inc. over allegations that the companies conspired to exchange extremely private and confidential information for their own benefit.
    • The plaintiff alleged that Flo Health violated their own policy by knowingly giving users’ information to third parties including the advertiser defendants.
    Source