Bill splitting made smarter, fairer, and less awkward. Keye led the design of SpiBill with one goal: take the stress out of splitting restaurant bills. Starting from a personal frustration, she validated the problem through research, defined clear user personas, and designed a solution that gave people control, flexibility, and clarity in group payments. She used a human-centered approach to prototype and test features like itemized billing, tax/tip automation, and real-time cost breakdowns. Throughout, she kept business goals in view — ensuring that the app could scale while remaining accessible to everyday diners. The result is a thoughtful, intuitive experience that transforms a common social pain point into a seamless flow.