I have updated Speccy-Android, my Sinclair ZX Spectrum emulator, to version 3.3 today. In this release, I have added screen positioning to the Joystick Editor and cleaned up the code, so that it does not keep holding system resources after you exit the app. If you previously experienced slowdowns after quitting Speccy, these problems should be gone now. Starting Spectrum games and switching between emulation and other activities (Settings, WoS Browser, etc) is also faster now, as the utility library is doing less work.

• Added screen resizing/positioning to the Joystick Editor.
  
• Added backdrop image to the Joystick Editor.
  
• Fixed FFWD button toggle mode.
  
• Fixed defunct processes left by some activities.
  
• Fixed stale timer thread remaining after exiting a game.
  
• Fixed DropBox and BoxArt threads left after exiting app.
  
• Fixed joystick resizing/positioning in the Joystick Editor.
  
• Fixed backdrop image shifting down after rotation.
  
• Reduced emulation start time by computing commond values once.
  
• Reduced switch times between Settings, Exchange, etc.
  
• Only starting Google Analytics tracker when needed.
  
• Keeping just one instance of Google Analytics tracker.
  
• Removed AdMob library, as the app is not running any ads.