Justinmind

Justinmind is a design and prototyping platform for web and mobile apps, featuring interactive drag-and-drop elements, data-driven forms, and transitions. Users can define screen flows, conditional interactions, and variable-driven logic. Collaboration modes let teams share prototypes and gather feedback. The software integrates with Sketch or Adobe XD for importing assets. A user testing mode collects click data and user comments. While the free plan covers basic prototypes, advanced features like requirements mgmt or real-time device simulation require paid subscriptions. Justinmind suits complex prototypes needing dynamic data and logic.