SUMMARY: Good balance between controls/value display and viewing area. MAIN FEATURES: ◾️ Slide to focus works very well. ◾️ White Balance control is excellent. There are no presets, but the slider has some of the standard symbols for color temperatures imbedded in it like sign-posts. Its a clever feature. Temperature and tint are clearly differentiated and easy to set. 18% grey calibration is set with a long-press. Great, get out your grey card! ◾️ Formats: JPEG quality, TIFF (uncompressed or LZW) ◾️ Tiltmeter: a clever leveling device. OTHER FEATURES ◾️ An icon next to the shutter speed display handily reminds you when its time to use stabilization or a tripod. ◾️ The anti-shake shutter button next to the standard shutter button; you can decide on the fly which mode you want to shoot in (this can be swapped for the Timer option). ◾️ The + volume button on the iPhone can be used as a shutter button. ◾️ There are a number of grids, histograms and aspect ratios to choose from. ◾️ A decent users manual is included in Settings. It is worth reading to get the most from the app. ◾️ The app has a good degree of customizable features to tailor the app to your shooting style. CONCLUSION: ProCamera is an excellent app. For features and usability I would compare this to PureShot, by Michael Hardaker. These two apps are from alternate universes; PureShot (and 645 Pro, its big brother) emulate the physical appearance of the controls and display of a DSLR. ProCamera eschews this esthetic in favor of a minimalist interface that is still rich in features that are easily accessible.