Can remember how I set it up. Tap the back of my iphone 3 times and it toggles greyscale. Makes t...

oldsklgdfth • today at 12:52 AM • 2 replies • view on HN

Can remember how I set it up. Tap the back of my iphone 3 times and it toggles greyscale.

Makes taking and looking at photos nice.

SoftTalker • today at 2:08 AM

Never knew that tapping the back of the phone did anything. Yet another Apple convention you only discover by accident?

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golem14 • today at 2:05 AM

That's pretty nifty -- how to you register taps on back with automation?

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