Sketches and PDF interaction prototypes were created to evaluate the potential concepts with the client team. While concepts were being developed, the design team began the planning and recruiting for the user testing sessions. Once concepts had been selected, high fidelity prototypes were created for user testing.

Concept testing was held in a usability lab in Boston, with 11 diabetic patients. Based on test findings, the interaction and visual design was iterated and finalized.

Specifications and final assets were created and validated with the client team.