ProtoPie

ProtoPie lets designers build advanced, sensor-driven, and multi-screen prototypes without coding. It supports gestures, conditionals, and real object interactions (e.g., tilt phone to move elements). Connections across devices simulate IoT or multi-device flows. A drag-and-drop “recipe” panel defines triggers (tap, drag, rotate) and responses (move, scale, audio). The result is high-fidelity prototypes that mirror real user experiences. Collaboration tools allow stakeholder feedback. The free tier provides limited prototypes, while paid versions expand features. ProtoPie caters to product teams exploring complex interactions or hardware-based app scenarios.