When comparing Flickr vs Google Camera, 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 Flickr is ranked 10th. 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 Can be set to auto-upload images
Flickr has an app on Windows, OSX, iOS and Android, called Flickr Uploadr (available for download in the tools section) that can automatically upload images to Flickr. It can even pull images from external drives and other cloud storage services such as iCloud.
Pro Photos are backed up elsewhere
I mainly use Google Photos and keep separate local backup of all my photos, but also use the IOS app which transfers all new photos onto Flickr storage as well.
Pro Good search
Flickr is capable of searching images by a combination of content, color, shape, depth of field, style, pattern, size, license and other options.
Pro Built-in image recognition
Flickr will automatically attempt to figure out the contents of a picture and tag them appropriately. This will allow you to look for, for example, all images of flowers, bridges or butterflies.
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.
Cons
Con No offline view
While Google Photos and iCloud Photo Library allow you to select if you want to keep local copies of your photos, Flickr only allow you to view your photos online.
Con There are limits on file sizes
Images can't be more than 200MB a piece and each video can't take up more than 1GB of space.
Con No support for lossless file formats
Photos can only be saved as .jpg, .gif (non-animated) and .png files.
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.