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I believe apps published by the same developer have the ability to share information transparently. Google is doing this with their apps - sign into the gmail

I believe apps published by the same developer have the ability to share information transparently. Google is doing this with their apps - sign into the gmail app on your iphone, and chrome, maps and youtube will ask you repeatedly to sign in using the same creds. ..and looks like it's not limited to same dev. Niantic published apps are also able to pull out my Google creds. Might be because I have a google account defined in iOS, might be because they're a former-Goog company and Goog have given them backdoor details. Any devs on iOS able to shed any real light on my vague speculation?

runeb 10y ago
Since iOS 8 apps can share data on device through so called App Groups if they are published with the same bundle identifier prefix. For that to happen I believe they have to be published by the same developer account. Here is a link about this in the context of sharing data between apps and app extensions: https://developer.apple.com/library/content/documentation/General/Conceptual/ExtensibilityPG/ExtensionScenarios.html https://developer.apple.com/library/content/documentation/Ge...