I observed some applications in play store are showing Allow Automatic Updating option with check box at the time of installation,some don't why? are there any settings or permissions to be added for this in manifest file or this is something available for preloaded apps or apps which has vendor/manufacturer certificate? What I have to do to get Allow Automatic Updating feature for my application on play store as a normal developer. Below Image showing what I am referring too. Any Suggestions please, Thanks In Advance.
[EDIT] just for Info
As a normal developer we can't implement this feature. The reason is android.permission.INSTALL_PACKAGES is just ignored by Android system unless your app is signed with manufacturer certificate. If your app is certified with manufacturer certificate then your app is treated as part of firmware and it is eligible for silent installation of any packages.