# Principle Mirror

> Interaction & UI Design

Canonical page: [https://chrome-stats.com/d/id991911319](https://chrome-stats.com/d/id991911319)

## Overview

- **ID:** `id991911319`
- **Platform:** Apple
- **Type:** Apple app
- **Status:** Available
- **Publisher:** Daniel Hooper
- **Category:** Productivity
- **Rating:** 4.20 / 5 (14 ratings)
- **Version:** 5.6
- **Last updated:** 2025-06-04
- **First published:** 2015-08-31
- **Size:** 1.00 MB
- **Data as of:** 2026-09-20
- **Store listing:** [Apple App Store](https://apps.apple.com/us/app/principle-mirror/id991911319)
- **Website:** [http://principle.app](http://principle.app/)
- **Privacy policy:** [http://principleformac.com/eula.html](http://principleformac.com/eula.html)

## Description

Principle Mirror is the companion app to Principle for Mac, a tool for designing interactive interfaces. Principle Mirror can open Principle files from other apps or mirror Principle for Mac when plugged in. 

“I just wanted to write to you quickly just to say — this. is. amazing. while I was watching the first tutorial I got tears in my eyes! seriously.”
Hugo Ahlberg
Designer, IDEO

"This tool is amazing, very well done."
Patrick Wong
Designer, Lyft

## Rankings

- #298,698 — Overall
- #14 — user experience
- #56 — figma
- #56 — ux

## Review summary

Principle Mirror is widely praised for fast, reliable operation, ease of use, and on-device interactivity that makes demos easy and impactful. Reviewers cite its strong animation tooling and the ability to store projects for client demos. However, it struggles with stability and UI bugs (random freezes, scrolling issues, restart gestures, and yellow boxes), plus font handling (non‑system fonts not packaged). Many users also want wireless/mirroring support and smoother performance with large files and sharing/tester workflows. Overall, powerful but in need of stability and feature polish.

### Pros

- Fast, smooth performance that reliably does what it’s supposed to.
- Excellent for presenting prototypes to stakeholders with interactive on-device previews.
- Very easy to use and quick to set up for demos.
- Project storage and reset features are valuable for customer demos.
- Powerful prototyping tool with strong animation capabilities.

### Cons

- Stability issues: frequent freezes and crashes.
- UI/interaction bugs: scrolling not working on iPhone X, page state resets, and visual glitches like yellow boxes; restart gesture unreliable.
- Font support is missing: non-system fonts aren’t packaged and are substituted with Helvetica.
- Lack of wireless/mirroring: no Wi‑Fi live mirroring or wireless updates.
- Performance problems with large files and lag.

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Source: [Chrome-Stats](https://chrome-stats.com/d/id991911319)