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UX Atlas
ToolCraft conventionFoundational

ProtoPie

High-fidelity prototyping with real conditional logic, variables and device sensors, without code.

Definition

A prototyping tool built around triggers, responses, variables and conditions. It handles interactions that link-based prototypes cannot: state, input, sensors and multi-device communication.

Craft convention. True because the industry converged on it. Breaking it costs familiarity, not correctness.

Good for

  • Conditional and stateful prototypes
  • Sensor and hardware interactions
  • Testing real input handling

Watch out for

A separate tool from your design file, so keeping the two in sync is manual work.

Each link says what the connection is, so you can tell a principle from an alternative from a thing people mix this up with.

Often used with

These usually appear in the same screen or the same decision.

Nearby in the Atlas

Adjacent territory, found through shared tags rather than a stated link.