Principle is a Prototyping tool for Mac. It costs about $129 a year, and a free tier is available. It rates 4 out of 5 across 101 reviews.
Features and pricing
| Category | Prototyping |
|---|---|
| Usage | 483 |
| Review Average | 4 |
| Review Numbers | 101 |
| Platform | Mac |
| Cost | 129 |
| Free | Yes |
| Design | Can only prototype with existing screens |
| Import | Sketch, Figma |
| Animations | Can animate objects |
| Transitions | Can be mimicked by transitioning objects |
| Data | Only static text supported |
| Code | No coding functionality |
| Inputs | No dynamic inputs |
| Variables | Variables not supported |
| Sharing | IOS, Mac |
| Handoff | No developer handoff |
| Sensors | No device sensors |
| Gamepad | Can't detect gamepad input |
| Voice | No voice support |
| Tasks | No guided tasks |
| Analytics | No supported analytics |
| Heatmap | No heatmap support |