Freezing the app works via decreasing the temperature of the app to roughly 50 Kelvin. At this point the the app's molecular structure becomes a super condensed crystal lattice. Due to the nature of the crystal lattice, android treats the super dense app as non existent. Essentially the app is deleted from your system completely. However, think of it not as a permanent deletion but rather a reversible one. Should you chose to 'restore' the app, you can defrost the app. You could defrost the app using a microwave but I for one use TB Pro as it does a far better job.