ProtoPie

ProtoPie is a professional tool for designing high-fidelity interactive prototypes that simulate real application behavior across mobile, desktop, web, and IoT devices. Designers create complex interactions, touch responses, gestures and animations using a visual scene-trigger-response methodology without writing any code. Global companies including Google, Microsoft, Samsung and BMW use ProtoPie to validate products before engineering development begins.

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• Multi-device synchronized prototyping. ProtoPie connects multiple prototypes running simultaneously on different physical devices. When a user interacts with an element on one device (such as a button on a smartphone), changes reflect instantly on another device (like a tablet or smartwatch), simulating complex connected product ecosystems.
• Advanced gesture recognition. The tool includes a complete gesture library: single tap, double tap, swipe in any direction, pinch-to-zoom, two-finger rotation, 3D touch and long press. Each gesture acts as an independent trigger to initiate animation sequences or state changes within the prototype.
• Device hardware sensors. ProtoPie accesses physical sensors on the testing device: accelerometer, gyroscope, compass, magnetometer, proximity sensor, battery level and screen pressure. This enables prototypes that react to device tilt, sudden movements or object approach.
• Variables and logical expressions. The internal engine supports number, text, boolean and color variable types. Designers create complex conditional logic (if-then-else), mathematical operators, text concatenation and value comparisons. Variables maintain prototype state across multiple scenes.
• Physics-based animations. Instead of simple linear animations, ProtoPie implements customizable easing curves, bounce effects, friction, elasticity and simulated gravity. Each object property (position, scale, rotation, opacity) animates with configurable mass, initial velocity and damping parameters.
• Haptic feedback and sound. The system adds tactile vibration patterns and audio file playback in response to any trigger. Haptics synchronize with visual animations, providing realistic tactile sensation during prototype testing sessions.
• Reusable and nested components. Designers create custom components encapsulating logical behavior, animations and internal states. These components nest within each other, instantiate multiple times across the same project, and update globally from a single source, reducing repetitive work.
• Keyboard and mouse input simulation. For desktop or web prototypes, ProtoPie recognizes specific keyboard events (individual key presses, modifier key combinations like Ctrl or Alt) and mouse events (enter, leave, click, double-click, scroll wheel). This includes detection of exact cursor position over elements.
• Voice-based prototyping. The tool incorporates speech recognition modules converting spoken commands into triggers, and text-to-speech synthesis allowing the prototype to respond with spoken messages. Custom grammar definitions specify phrases the prototype must recognize, simulating complete voice assistants.
• Scenes and conditional transitions. A single project contains multiple independent scenes (different screens or complete states). Transitions between scenes activate through logical rules based on variables or gestures. During scene changes the system preserves variable values or resets specific states as configured.
• Call and push notification simulation. ProtoPie emulates incoming calls, SMS text messages, operating system notifications and external interruptions. The prototype reacts to these interruptions by pausing, resuming or modifying its behavior, which proves critical for usability testing in realistic environments.
• Video export and test logging. The application records complete interactive sessions as video files, including simultaneous display of the device screen and logs of all performed touch gestures. Exported videos serve as executable documentation for development teams or stakeholders.

ProtoPie was created by Studio XID, a company headquartered in South Korea. Development began in 2014, and the first stable version was officially released in 2016. The primary programming language used to write the core of ProtoPie is C++, complemented with web technologies for some sections of the user interface. The original developers specialized in human-computer interaction and advanced animation, seeking a visual alternative to code-based prototyping tools.

Alternatives to ProtoPie:

Blockbench

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Price: Free   Size: 197 MB   Version: 5.0.5   OS: Windows, Linux, MacOS