Have you noticed that ads for apps you have uninstalled for a long time still appear on your device? A recent report by Bloomberg suggests that app developers have found a "legitimate" way to keep track of you even if you've deleted some of their apps.
There seem to be companies that offer uninstaller detection services for application developers Android and iOS. They are essentially silent push notifications, which developers have long used to update their application information without having to inform the user.
However, in this case, a silent push notification is specifically sent to check if the application is installed or not.
Bloomberg writes: "If the application does not return back to the developer, it is recorded as uninstalled and the removal tracking tools add those changes to the file associated with the unique ID of that device."
Companies such as MoEngage, Localytics and CleverTap offer these "Uninstall tracking" services to application developers. And then companies such as T-Mobile and Spotify use these services to win back consumers.
The report also notes that Google's and Apple's privacy policies are clearly violated. "Silent push notification" is set to benefit users rather than triggering the installation uninstaller detection system.
To conclude, if you come across any kind of ad, be sure certain app developers are hiding behind!