When comparing Google Camera vs ProShot, the Slant community recommends Google Camera for most people. In the question“What are the best photography apps for Android?” Google Camera is ranked 2nd while ProShot is ranked 9th. The most important reason people chose Google Camera is:
HDR can be activated or deactivated with one swipe of the thumb.
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Pros
Pro HDR mode
HDR can be activated or deactivated with one swipe of the thumb.
Pro Photo Sphere
Use Photo Sphere and Google Camera to create three hundred and sixty degree panoramic photos easily. Photo Sphere photo images allow the viewer to move around within the world you have created, move up, down, left or right to see everything. Photo Sphere also gives you the tools to create your own Google Maps street view and share it with other Maps users.
Pro Lens Blur
A recently added feature to Google Camera, Lens Blur gives you the SLR like function of creating images with shallow depth of field, or limited areas of focus. Basically, lens blur will only blur the background in order to put more emphasis on an object.

Pro Simple clean interface
Google Camera has a very easy to use and simple interface, with the most important controls right at your fingertips. Google has redesigned the Camera app for every skill level of user, making photography more accessible to everyone.
Pro It is free
It's free if you have one of the supporting devices (Google Nexus or Pixel).
Pro Support panorama shots
Which is also supported by the Android stock camera.
Pro Full manual control in Photo, Timelapse, and Video modes
On devices with Camera2 API support (currently LG G4, Nexus 5, Nexus 6, Samsung Galaxy S6/S6 Edge), ProShot offers full manual control over ISO, shutter, white balance, and focus, in any mode, even during video recording.
Pro Supports multiple aspect ratios
ProShot has options for 4:3, 16:9 and 1:1 aspect ratios allowing the shooter to choose what best suits their intended shape. It also has support for custom aspect ratios, so 3:2, 21:9, 50:3, and more are all possible.
Pro RAW and other format support
ProShot can shoot in RAW, RAW + JPEG and JPEG formats, giving ample options for one to shoot in.
Cons
Con Requires Android 4.4+ (KitKat)
The Google Camera app system requirements do require Android 4.4 (KitKat) or better, as a result this does leave out a lot of older phones and tablets. The app does take advantage of features of higher end phones, so you will need to upgrade if your device has an older version of Android.
Con Limited device support - Only available for Google Nexus and Pixel
In 2016 they stop providing Google camera for non google devices. You can download APK and install. But it crashes and most likely the video camera will not work.
Con Photo Sphere does not work on all CPUs
For example, Android-Lenny 4.4 does not support this.
Con Aspect ratio function is broken
