The Google Search app v4.0 on Android can acquire knowledge of your preferred apps to perform certain repeated voice actions via 'OK Google' commands that don't specify the app.
Google depicts the new forms in a support document for OK Google voice search and actions on its site, first spotted by Android Police. Once users give the same voice command multiple times and select the same app, Google will learn this is the preferred app for the function, and by default launch the app automatically when the same command is given again.
For example if the user gives an OK Google demand to play a particular song, the smartphone would give app options on a card such as Google Play Music,YouTube and others apps which support the audio playback feature and have the song. On selecting one of the apps and pressing the play button many times, Google would make it as the default app and would open it every time for the same command. Other commands include 'scan receipts' said by Google.
Users would also be able to remove the automatically launching of preferred apps by entering the text command instead of voice command, and clicking on cancel 'X' icon alongside the default app. Once users do this a few times, Google will no longer launch the app automatically.
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