pCloud is a cloud service located in Switzerland, which uses the industry-standard AES 256-bit encryption. Piktures is NOT associated with pCloud.
Piktures is able to manage, view, download from, and upload photos to pCloud.
Piktures uses Box WebDav access to execute those operations. As a Piktures user, you will have to enter your username and password. The credentials will be stored locally on your smartphone. They are not sent anywhere outside of this device.
pCloud has the particularity to have two access points depending on the location of the end-users. Piktures lets you choose between the Europe-based access, or the US-based access.