The Paint Colour Finder app does not collect any data from the user.
The app allows users to have photos analysed by the app by (1) accessing photos on their device or (2) taking photo using the built in camera.
The photos remain stored on the device and are not shared with the developer or anyone else. The app scans the photo for colours and compares these against paint swatches from paint manufacturers. These tiny swatches are are also stored in the app folder on your device so there is no need for your photos to be uploaded to another location for analysis.
If this policy changes, an app update will be required and the user will be informed of the change.