By "safe" I specifically mean: safe from potential (unauthorized) access of other entities of Android system, such as third party applications.

While it's clear that no app is safe from users (in this case, installing apps from suspicious sources) acceptable safety would imply:

  • safe connections (SSL/TLS) to and from server
  • password used only once, in order to obtain token, and never stored
  • stored email messages encrypted or another way to disallow any other entity on the OS from viewing/altering its content
  • Every app runs in its own sandbox and other apps can't access it. But if you give an app root access then it will have access to everything including your mails and saved passwords.
    – defalt
    Mar 11, 2017 at 18:57
  • @defalt I'm aware of that. But question is also if third party app can check for /path/to/gmail/emails/ and read email contents or not. Mar 11, 2017 at 21:24
  • Only if you give that app administrator permission or if it asks for administrator privileges. What app can do in administrator mode is also mentioned in Android Manifest.xml. Giving administrator rights is different from giving root access.
    – defalt
    Mar 12, 2017 at 7:45


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