The feature is called Back Tap and, like the Action Button on newer iPhones, it gives you one more way to use your device ...
The iPhone Camera app features key icons like the flash for lighting control, Live Photo for motion capture, and the caret for advanced settings. Icons vary by mode, with options for exposure, timer, ...
Imperfection, grain, film tones, it’s all cool again, and I’ve found a new iPhone app that lets you do a lot for free.
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