iOS Haptic Touch
Just long-press on an app and see what pops up. It might be useful, it might not be. It depends on the app!
You can even do the same with built-in iOS features, such as Control Center.

1 of 11 Adrian Kingsley-Hughes/ZDNET
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YouTube

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Twitteer
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Camera
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Audible
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Freedome
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Tile
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Flashlight
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Bluetooth
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Wi-Fi
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