RegionMirror

Product Introduction

1. Definition: RegionMirror is a native macOS screen-sharing utility that functions as a virtual camera or display source. Technically, it is a screen region capture and mirroring application that creates a virtual, resizable window containing a live feed of a user-defined portion of their physical monitor(s).
2. Core Value Proposition: It exists to solve the fundamental usability and privacy issues of sharing high-resolution and ultrawide monitors (e.g., 5120x1440, 3840x1600) on video conferencing platforms like Zoom, Microsoft Teams, Slack, and Discord. Its primary value is enabling presenters to share a focused, readable region of their screen at an optimal resolution for viewers, while maintaining the flexibility of their full desktop workspace and avoiding the constant need to stop and restart shares when switching applications.

Main Features

1. Dynamic Region Selection & Sharing: Users can drag to define a rectangular region on any connected display. This region is then mirrored into a dedicated, borderless "RegionMirror" application window. This window acts as a standard macOS window that can be selected as the share source in any conferencing app's "Share Window" function. The region can be resized, repositioned, or moved to a different monitor dynamically without interrupting the active screen share session.
2. Persistent Default Regions & Global Keyboard Shortcuts: The app allows users to save a custom default region for each physical monitor (e.g., a 1600x900 area on the left side of Display 1). These defaults can be invoked instantly via customizable, system-wide global hotkeys (e.g., Ctrl+Opt+Shift+1 for Display 1). This feature eliminates repetitive setup and enables one-key sharing from within any full-screen application or game.
3. Integrated Presentation Toolkit (Annotations, Blur, Whiteboard): Beyond basic mirroring, RegionMirror includes a suite of overlay tools. Annotations: Users can place movable, resizable arrows and text labels directly onto the shared region feed, visible to all viewers. Privacy Blur: A one-click toggle instantly applies a Gaussian blur effect over the entire shared region, obscuring sensitive data like passwords or emails. Whiteboard: A dedicated mode replaces the screen feed with a blank or gridded canvas for freehand drawing and text, all within the same shared window, eliminating the need to switch to a separate whiteboard app.

Problems Solved

1. Pain Point: The "Can you zoom in?" problem. Sharing an entire ultrawide or 5K monitor results in content being shrunk to an unreadable size for viewers on standard-resolution screens. Conversely, sharing a single application window forces presenters into a disruptive cycle of stopping the share, switching apps, and re-sharing, breaking presentation flow.
2. Target Audience: Knowledge Workers with High-Resolution Setups: Software developers, DevOps engineers, data analysts, and UX designers who use ultrawide or multi-monitor setups for coding, terminal work, and design. Remote Presenters & Trainers: Sales engineers, product managers, and online educators who demo software, walk through slides, and need to annotate live. Consultants & Financial Analysts: Professionals who present dashboards, reports, and sensitive data from large screens and require quick privacy controls.
3. Use Cases: Live Coding Demo: A developer shares a region containing their IDE and a terminal, dragging a browser window with documentation into the region as needed, all within one continuous share. Sales Pitch: A salesperson shares a region with their demo software and slides, using the annotation tool to highlight features, and the blur to hide client data in other open windows. Agile Sprint Review: A scrum master shares a region containing their Jira board and Figma mockups, using the whiteboard to sketch out new user flows during discussion.

Unique Advantages

1. Differentiation: Unlike built-in screen-sharing options (which share everything or a single window) or generic screen-capture tools (like OBS, which is complex), RegionMirror is purpose-built for seamless, meeting-centric region sharing. It requires no virtual camera drivers or browser plugins. Unlike simply cropping a display in system settings, it allows dynamic, on-the-fly adjustment of the shared area during a call.
2. Key Innovation: The combination of persistent, per-display region memory with global hotkeys and a native, shareable window output. This workflow innovation transforms region sharing from a manual, multi-step process into a instantaneous, muscle-memory action. The integration of non-destructive annotation and blur tools directly into the mirror feed creates a unified presentation layer that works identically across all conferencing platforms.

Frequently Asked Questions (FAQ)

1. Does RegionMirror work with Google Meet? Yes, RegionMirror works with any video conferencing or streaming software that can select a specific application window as a share source. This includes Google Meet, Zoom, Microsoft Teams, Slack, Discord, and others. You select the "RegionMirror (Share this window!)" window within the application's sharing dialog.
2. What are the system requirements for RegionMirror? RegionMirror requires a Mac running macOS 13.5 (Ventura) or later. It is a universal binary, meaning it runs natively on both Apple Silicon (M1/M2/M3) and Intel-based Macs. It requires standard macOS Screen Recording permission to function.
3. Can I use RegionMirror with multiple monitors? Absolutely. RegionMirror detects all connected displays. You can define and save independent default regions on each monitor (e.g., a coding region on your ultrawide and a reference region on a vertical monitor). Each display has its own keyboard shortcut for instant activation.
4. What happens after the 7-day free trial ends? After the trial, the core region-sharing functionality continues to work indefinitely but is limited to a fixed 1080x720 region size. To unlock custom region sizing, annotations, privacy blur, the whiteboard, and saved defaults, a one-time in-app purchase is required.
5. Is my data secure? Does RegionMirror send my screen anywhere? No. RegionMirror operates entirely locally on your Mac. The screen capture, region processing, and mirroring happen in real-time on your device. No screen data is transmitted to any external servers. The app contains no analytics or tracking, as outlined in its privacy policy.