Pocket Screen

Product Introduction

1. Definition: Pocket Screen is a macOS menu bar utility application that functions as a window management and productivity tool. Technically, it leverages macOS ScreenCaptureKit to create live, always-on-top Picture-in-Picture (PiP) overlays from any selected application window.
2. Core Value Proposition: It exists to eliminate disruptive context switching by allowing users to keep critical reference material—such as documents, communication threads, videos, or dashboards—visibly pinned on top of other full-screen applications. Its core value is providing persistent, compact window visibility for enhanced multitasking workflow efficiency on Mac.

Main Features

1. Dual Independent PiP Views: Pocket Screen supports up to two separate, always-on-top PiP windows simultaneously. Each view can source content from different applications (e.g., a Slack chat and a YouTube tutorial). The selection is controlled via a global keyboard shortcut (default: Option-Command-P) or the menu bar, with a visual accent border indicating the active target for switching.
2. Local ScreenCaptureKit Processing: The app uses the native macOS ScreenCaptureKit framework for high-performance, low-latency window capture. This technology ensures live content updates, including video playback, and guarantees all pixel data is processed locally on the user's Mac, addressing privacy and security concerns. It requires macOS Screen Recording permission solely for this local mirroring function.
3. Space- and Display-Aware Persistence: Each PiP view is intelligently managed by the macOS window server. PiPs automatically hide when the user switches to a different desktop Space where the source window is not present and reappear upon return. Their positional data (size, location, snap state) is stored individually and persists across application restarts, display configuration changes, and even when the PiP's source window is switched.

Problems Solved

1. Pain Point: The constant need to Alt-Tab or Command-Tab between applications breaks focus, wastes time, and disrupts deep work flow states, especially when referencing static or dynamic content from a secondary source.
2. Target Audience: This includes software developers referencing API documentation or terminal output; content creators and video editors monitoring source footage or chat streams; researchers and analysts cross-referencing data between spreadsheets and reports; customer support agents following knowledge base articles while using a ticketing system; and students watching lecture videos while taking notes.
3. Use Cases: Essential scenarios are: coding while keeping documentation or a design mockup visible; participating in a video call or monitoring a live stream while working in another app; following a recipe or tutorial guide without leaving the primary workspace; and tracking real-time data dashboards or communication channels during focused task execution.

Unique Advantages

1. Differentiation: Unlike simple window "always-on-top" utilities or browser extensions, Pocket Screen is a system-level, app-agnostic solution. It works with any supported macOS window, not just browsers. Compared to manual window resizing and arranging, it provides a dedicated, persistent, and compact PiP overlay that doesn't interfere with window management of primary applications.
2. Key Innovation: The integration of ScreenCaptureKit for a system-efficient, live PiP engine is its technical cornerstone. This allows for the unique combination of live content mirroring (including protected DRM content where permitted by the source app), local-only processing, and seamless Space awareness—features not commonly found together in lightweight menu bar utilities.

Frequently Asked Questions (FAQ)

1. Does Pocket Screen work on Mac with multiple monitors? Yes, Pocket Screen is fully multi-monitor aware. PiP windows can be moved and resized across any connected display, and their positions are remembered per-display. They remain correctly on-screen even if the display arrangement is changed.
2. Is my data secure with Pocket Screen? Does it send my screen anywhere? All screen capture processing is performed locally on your Mac using macOS's native ScreenCaptureKit API. The captured pixel data is used exclusively to render the local PiP preview window and is never transmitted over a network, recorded, or stored to disk by Pocket Screen.
3. What are the system requirements for Pocket Screen? Pocket Screen requires macOS 14 (Sonoma) or later. This requirement is due to its dependency on the ScreenCaptureKit framework introduced in that version. It is a universal binary compatible with both Apple silicon (M1/M2/M3) and Intel-based Macs.
4. Can I interact with the content inside the Pocket Screen PiP window? By default, PiP windows are non-interactive (click-through) to prevent accidental focus stealing. However, for the selected PiP, you can temporarily disable the click-through behavior from the menu bar or settings to allow direct interaction with the mirrored content when needed.
5. How does Pocket Screen affect my Mac's performance and battery life? Utilizing the hardware-accelerated ScreenCaptureKit framework ensures minimal performance overhead. Battery impact is generally low, but as with any continuous screen capture activity, keeping a PiP active with rapidly updating content (e.g., 60fps video) will consume more energy than displaying a static document.