It may not be applicable to other software produced or released by Piotr Chaba (the author).
The author does not collect any statistics, personal information, or analytics from the users, other than built in mechanisms that are present for all the mobile or embedded applications in their respective main distribution channels.
CHOOS! allows for images 1) to be taken, analysed, and sent to other people or uploaded to social media; and 2) stored on the device; such actions are fully controlled by the user. Neither the author nor any known third party have access to any information by this app, stored in the device or sent out by the user. Cookies are not stored at any point.