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It's a bad practice according to Google, but not forbidden. https://developer.android.com/training/articles/user-data-ids https://developer.android.com/trainin

• mtgx 7y ago
  I believe there were some slight restrictions in Android 10, but probably nowhere near enough (the platform is owned by a tracking company after all): https://developer.android.com/about/versions/10/privacy/changes#data-ids https://developer.android.com/about/versions/10/privacy/chan... Check this out: https://blog.acolyer.org/2019/09/25/50-ways-to-leak-your-data/ https://blog.acolyer.org/2019/09/25/50-ways-to-leak-your-dat...