title: Unity PlayerPrefs saving
body: <p>I use some <code>PlayerPrefs</code> in my Unity app (platforms are: iOS, Android, Windows). Now I want to release update, so it's a question: when users update there apps - will <code>PlayerPrefs</code> be saved? The problem is that I store the game progress in this prefs and if users will lose it after update - it will be very bad.</p>
  
  <p>Is there reliable information about this question?</p>