Split

Product Introduction

1. Definition: Split is a native macOS menu-bar window management utility. It is a lightweight, single-purpose application designed to organize application windows into side-by-side or top-bottom layouts with persistent, linked resizing capabilities.
2. Core Value Proposition: Split exists to eliminate the friction of manual window arrangement on macOS, enabling users to create, manage, and dynamically resize a multi-window workspace with speed and precision. Its core value is increasing productivity and maintaining focus by providing fast window snapping, intelligent paired resizing, and workflow-aware window switching without subscription fees.

Main Features

1. Multi-Method Window Placement: Users can arrange windows via keyboard shortcuts, a menu-bar dropdown, or drag-to-snap zones. The software utilizes macOS Accessibility APIs to programmatically query window positions and execute resize/move commands. A key technical behavior is the "snap zone" preview, which renders a translucent overlay of the target layout before the user releases the mouse button.
2. Linked Proportional Resizing: The signature feature is the interactive white divider between paired windows. Dragging this divider resizes both adjacent windows simultaneously in real-time, with their content (e.g., web pages, documents) updating live during the drag. This is implemented by calculating and applying proportional size constraints to both window frames concurrently via the macOS window server.
3. Contextual Window Stack Management: Each side of a split layout maintains a stack of windows. Clicking the window-count badge opens an application switcher for that side; clicking again cycles through the stack. The "one-click swap" feature exchanges the entire window stacks between sides, automatically adjusting the divider position to respect each front window's minimum size constraints.
4. On-Device Suggestion Engine: After repeated manual pairings of specific applications (e.g., Safari with Notes), Split can suggest the paired app for the empty side. This learning occurs locally; all window and app metadata used for pattern recognition remains on the user's Mac, aligning with privacy-focused design.

Problems Solved

1. Pain Point: Manual window management on macOS is inefficient, requiring users to drag, resize, and align windows individually, which breaks concentration and wastes time. Native macOS split-view (Stage Manager) is limited to full-screen mode and fixed ratios.
2. Target Audience: The primary user personas are knowledge workers, developers, researchers, writers, and students who routinely work with multiple reference materials, communication tools, and documents simultaneously on a single screen. It is particularly valuable for users of laptops or single-monitor setups who need to optimize limited screen real estate.
3. Use Cases: Essential scenarios include coding with an editor and browser/dev tools side-by-side, writing a report while referencing source documents, comparing two spreadsheets or PDFs, monitoring communication apps (Slack/Teams) alongside a primary work app, and conducting research with a browser and note-taking app paired.

Unique Advantages

1. Differentiation: Unlike subscription-based window managers (e.g., Magnet, Moom) or tiling window managers, Split is a one-time purchase focused on the specific paradigm of linked window pairs. It differs by offering live content updates during resizing and deeper stack management per side, going beyond simple keyboard-driven snapping.
2. Key Innovation: The live, linked resizing of application content within the windows during divider drag is a significant technical and UX innovation. Most managers only resize the window frames; Split's integration ensures the user can visually judge the optimal layout based on the actual content, not empty containers. Combined with 100% on-device, private suggestion learning, it offers a smart yet secure experience.

Frequently Asked Questions (FAQ)

1. Does Split work with multiple monitors? Yes, Split functions independently on each connected display. You can create and manage separate window pairs on each monitor, and the menu-bar controls are available on all screens.
2. Can I use Split to create layouts with more than two windows? Split is specifically architected for managing pairs of windows (left-right or top-bottom). For more complex layouts involving three or more directly resizable zones, a full tiling window manager would be required. However, you can have multiple independent Split pairs active across your desktop.
3. Is there a trial version available before I buy? The vendor does not offer a traditional time-limited trial. Prospective users should review the feature set, supported macOS version (Ventura 13+), and video demonstrations on the official website to assess suitability.
4. How do I move my Split license to a new Mac? Deactivate Split on the old Mac via the app's "License" menu or your online account page. Then, simply download Split on the new Mac, enter your existing license key, and activate it. The license permits activation on one Mac at a time.
5. Why does Split require Accessibility permissions on macOS? This is a system-level security requirement. For any app to programmatically control the position, size, and focus of other applications' windows (a core function of any window manager), macOS mandates enabling it in System Settings > Privacy & Security > Accessibility. Split uses this access solely to execute the window actions you directly initiate.