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FlashSpace VS Rectangle

Compare FlashSpace VS Rectangle and see what are their differences

FlashSpace

Ultra-fast virtual workspace manager for macOS, enhancing native Spaces. Supports switching workspaces independently on displays, with hotkey-driven app management, multiple configurations, Picture-in-Picture mode, and SketchyBar integration.

Rating
0 reviews
Alternatives Is it good?
Rectangle

Window management app based on Spectacle, written in Swift.

Rating
0 reviews
Pricing
Open source
Alternatives Is it good?
Resettle
Unplug a monitor and macOS piles your windows onto the laptop. Resettle remembers where every window goes on each setup and puts it back. $14.99 once. sponsored

Which is more popular?

Based on our record, Rectangle seems to be more popular. It has been mentioned 480 times since March 2021.

social mentions
0 vs 480
Productivity popularity
100% vs 0%
alternatives listed
34 vs 240+

Base details

Website, pricing, platforms and company facts side by side.

FlashSpace
Rectangle
Website github.com rectangleapp.com
Pricing —
Open source
Listed in
Productivity Note Taking OS & Utilities Mac +1
Mac Tools Window Manager Mac Developer Tools +1

Features and specs

What each product offers, as listed by its team.

FlashSpace 3 features
Rectangle 5 features
  • Open-Source
    FlashSpace is open-source, allowing users to view, modify, and contribute to the code, fostering community collaboration and transparency.
  • Functionality for Flash Games
    FlashSpace provides a means to interact with and manage Flash-based applications, which can be valuable for preserving and using legacy Flash content.
  • Cross-Platform Compatibility
    The project appears to be designed to work across different platforms, making it accessible to a wider audience using various operating systems.

Possible disadvantages

  • Niche Use-Case
    With the decline of Flash support in modern browsers, the necessity for such a tool is limited to niche applications or legacy projects.
  • Potential Security Risks
    Interacting with Flash content can pose security concerns, as Flash has historically had various vulnerabilities that could be exploited.
  • Maintenance and Updates
    The project might not be actively maintained or frequently updated, which could lead to compatibility issues or unresolved bugs.
  • Ease of Use
    Rectangle offers an intuitive user interface that makes window management straightforward and user-friendly.
  • Customizable Shortcuts
    Users can easily configure keyboard shortcuts to better suit their workflow, making window management faster and more efficient.
  • Free
    Rectangle is available for free, making it accessible to anyone without the need for a financial investment.
  • Frequent Updates
    The app receives regular updates, introducing new features and ensuring compatibility with the latest macOS versions.
  • Lightweight
    Rectangle is a lightweight application that doesn't consume many system resources, ensuring smooth performance even on older Macs.

Possible disadvantages

  • Limited Advanced Features
    Rectangle lacks some of the more advanced features found in paid window management applications, such as multiple monitor support and more complex window arrangements.
  • MacOS Only
    Rectangle is only available for macOS, so users of other operating systems are unable to take advantage of its features.
  • Occasional Bugs
    Some users report occasional bugs or unpredictable behavior, which might require troubleshooting or waiting for a future update.
  • Learning Curve for Shortcuts
    While customizable shortcuts are a benefit, there is an initial learning curve for users to memorize and effectively use these shortcuts.
  • Basic Aesthetic
    The app's design and aesthetic are quite basic, lacking the polish and visual appeal found in some other similar tools.

Analysis

An editorial look at what each product does well and who it suits.

FlashSpace
Rectangle

Overall verdict

  • FlashSpace is a lightweight, open-source, and free macOS workspace/virtual desktop manager that offers a fast and customizable alternative to macOS's native Spaces, making it a solid choice for users seeking better window and workspace management.

Why this product is good

  • Free and open-source, giving users transparency and no cost
  • Lightweight and fast compared to native macOS Spaces switching
  • Highly customizable with support for keyboard shortcuts and per-app workspace assignments
  • Provides a better multi-monitor and workspace workflow than macOS defaults
  • Actively developed on GitHub with community involvement

Recommended for

  • macOS power users who want faster workspace switching
  • Developers and professionals managing many apps and windows
  • Users frustrated with the slowness of native macOS Spaces
  • People who prefer open-source, customizable productivity tools
  • Multi-monitor setups needing efficient workspace organization

Overall verdict

  • Overall, Rectangle is highly regarded for its ease of use, extensive customization options, and the fact that it is free and open-source. It provides essential functionality without unnecessary complexity, making it suitable for both casual users and power users who need efficient window management.

Why this product is good

  • Rectangle is a popular window management tool for macOS, known for its simplicity and ease of use. It allows users to efficiently organize and resize application windows using customizable keyboard shortcuts or by dragging windows into pre-defined areas of the screen. This can enhance productivity by minimizing the time spent arranging windows and improving multitasking capabilities.

Recommended for

    Rectangle is recommended for macOS users looking for a straightforward, lightweight solution to manage application windows. It is particularly beneficial for those who frequently work with multiple applications at once, including developers, designers, and anyone who values a tidy and organized desktop environment.

Videos

Walkthroughs and reviews on video.

FlashSpace 0 videos + Add
Rectangle 3 videos + Add

No FlashSpace videos yet. You could help us improve this page by suggesting one.

SKYWALKER RECTANGLE TRAMPOLINE REVIEW!!!

More videos

  • - Skywalker Rectangle Trampoline Review #1
  • - Marvin Malton 160 Rectangle Flying Hour Watch Review

Category popularity

How often each product is chosen within a category, 0–100% relative to the other.

Score bands 0–20 21–40 41–50 51–60 61–100
FlashSpace
Rectangle
100% 100%
Productivity
0% 0%
0% 0%
Mac Tools
100% 100%
100% 100%
Note Taking
0% 0%
0% 0%
Window Manager
100% 100%

User comments

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Reviews and articles

External articles and on-site reviews we used to compare the two products.

FlashSpace no reviews yet
Rectangle no reviews yet

We have no reviews of FlashSpace yet. Be the first one to post

  • Best 6 Mac Window Managers
    mackeeper.com · Sep 2023

    Rectangle shows that you don’t need to dip into your bank account to get window resizer tools. This free Mac window manager lets you manage multiple windows using keyboard shortcuts, menu options, or by dragging and...

  • Top 6 Window Manager Apps for Mac
    www.maketecheasier.com · May 2023

    Most window manager apps for Mac support multiple monitors. They can help you move windows between screens and create custom layouts for each monitor. Many window manager apps – such as BetterSnapTool, Magnet, and...

  • The 6 Best Mac Window Management Tools
    www.makeuseof.com · Apr 2023

    However, it might take some time for you to get used to the shortcuts in the Rectangle app since there are many. Furthermore, you can also add some of your apps to exceptions if you want to keep them away from...

Social recommendations and mentions

Recommendations tracked on public social media and blogs since March 2021.

FlashSpace 0 mentions
Rectangle 480 mentions

Tracking FlashSpace since Jun 2025.

  • Apple introduces M6 and M5 Ultra for a big leap in performance and AI compute
    Rectangle solved my macos window management annoyances. https://rectangleapp.com/ Not involved in dev of this, just a happy user. - Source: Hacker News / about 1 month ago
  • Ubuntu 26.04 LTS Released
    As a both old Linux and now decade user of MacOS, after I got used to no middle-click paste and no focus-follows-mouse: 1. Keyboard shortcuts are Emacs, Ctrl-A: start of line, E: end of line, K: kill selected or to end of line, Y to... - Source: Hacker News / 5 months ago
  • Native Instant Space Switching on macOS
    Every macOS user uses Rectangle.app — https://rectangleapp.com The ones who don't use it is because they don’t know it exists. - Source: Hacker News / 6 months ago

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Alternatives to FlashSpace and Rectangle

When comparing FlashSpace and Rectangle, you can also consider the following products.

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