I'm using the alpha-155 version of the Android app, but I doubt this is specific to any platform or version.

When setting a featured image on mobile you have the option to search the Pexels free photo library for an image (which is great), but that option isn't available when adding an image with the image block. I'm not sure if this is intentional or not.

Steps to reproduce:

1. Add an image block
2. Click the 'choose image' link
3. Notice the lack of an option for using the Pexels library