After owning a G2, I have to say that if a phone doesn't have physical buttons, then they absolutely need some sort of gesture based on/off. The knock-on/off feature is far far better than having to find the power button on the side or back of any phone.
Is it useful for an iPhone or Samsung phone? Not really - I tried a couple on my Note 3 and S4, but found it no faster/convenient than hitting the physical home button. With the S-view cases, it's doubly unnecessary.
Is it useful for an iPhone or Samsung phone? Not really - I tried a couple on my Note 3 and S4, but found it no faster/convenient than hitting the physical home button. With the S-view cases, it's doubly unnecessary.