Peripheral Device Case with Separate Computer Hardware for Recording and Protecting Health Information

New peripheral device cases and methods of use are provided. In some embodiments, specialized hardware for acquiring and protecting personal data is provided within a smartphone case. A new form of transparent overlaid touchscreen is provided, configured to be overlayed onto the screen of a smartphone held within a case, recording both visual data and user input related to the screen, while permitting normal actuation of the smartphone screen through the overlaid touchscreen. In some embodiments, data is secured and managed within separate computer hardware within a case, and shared with a smartphone held within it, and/or with a network, upon obtaining user consent. In some such embodiments, a case with squeezable sections is provided, configured to monitor pressure applied by a user and record a user's grip strength.