How to Port Game to iOS Device with same resolution in Engine ?

I’m Developing a 2D iOS Game for iPad ( version 4 above ) , using an Orthographic Camera .
And i’m using 2DToolkit in order to make my 2d Gam objects.
My problem is that when i Build/Run The Game on the device , The resolution Comes Down .
its like extra scaling , which brings the quality Down .
but the point is that , it will not be happened when i play the game on the engine itself .
what should i do , in order to make this quality not to be changed ?
is there any option i should change in the player settings ?
or any scripts ?
is there anything related to LOD ?

Check your “Player Settings”, under iOS (obviously), “Other Settings” - “Configuration” you can (recently) change the “Target Resolution”. If it’s set to auto it could scale down.