Finance professionals still rely on dedicated calculator hardware despite smartphones, valuing specialized functions and tactile operation.
Develop an app replicating all HP 12c functionality with modern features like cloud sync, formula sharing, and interactive tutorials.
Charge a premium price ($20+) to professionals who currently buy $100+ physical calculators.
Launch with core TVM calculations first, then add vertical-specific functions (real estate, bonds etc).
The challenge is replicating the muscle memory of physical button workflows in a touch interface.