The short version: Rectangle app exists because a beloved free window manager, Spectacle, stopped being maintained and its own creator pointed people toward a successor. What started as a project to carry that idea forward on updated foundations has become the default recommendation for Mac window snapping — free, open source, and still getting updates years later. Here’s how that happened.
Before Rectangle: the gap Spectacle left
For years, Spectacle was the app a huge number of Mac users reached for — free, keyboard-driven, and simple. Then its developer stepped away and archived the project, which is a common enough story in open source software: a maintainer moves on, and a tool a lot of people depend on quietly stops getting updates. Software doesn’t fail all at once when that happens. It rots slowly, as each new macOS release shifts something underneath it that nobody is left to fix.
What made Spectacle’s ending different from a typical abandoned repository was that its own creator explicitly recommended a replacement rather than just walking away silently — pointing users toward Rectangle as the project carrying the same idea forward.
Building on the same foundation, differently
Rectangle wasn’t built from nothing. It shares DNA with Spectacle’s approach — free, open source, keyboard-first snapping — but rather than patching an aging codebase, it was rebuilt with its own engine on foundations meant to keep working as macOS itself changed. That distinction mattered more than it might sound: a fresh foundation is what allows a project to keep pace with new operating system releases instead of accumulating the kind of technical debt that made maintaining Spectacle difficult in the first place.
The philosophy carried over directly, though. Snap windows with the keyboard, keep it fast, keep it free, keep the code open for anyone to inspect. Where Rectangle diverged was in scope — adding sixths, drag-to-snap zones, and far deeper shortcut customization than Spectacle ever had, on top of matching everything the older app already did.
Why open source mattered to how it grew
Being released under the MIT license and hosted publicly on GitHub shaped Rectangle’s growth in a specific way. Anyone could inspect exactly what it did, which built the kind of trust that’s hard to manufacture through marketing alone — for a tool that requires system-level Accessibility permission to function, being able to verify there was nothing hidden inside mattered to a lot of people deciding whether to install it. It also meant the project could accept contributions rather than depending entirely on one person’s spare time indefinitely, which is part of why it avoided repeating Spectacle’s fate.
How it became the default recommendation
Rectangle’s rise wasn’t really about winning a feature competition — plenty of paid apps like Magnet, BetterSnapTool, and Moom offer legitimate value and predate or postdate it. What set Rectangle apart was the combination of being free, being open, and actually staying maintained through years of macOS updates, at a time when several other free tools in the same space went quiet. When something is free, open, actively updated, and does the core job well, it tends to become the thing people recommend by default — not because nothing else exists, but because it removes every reason to look further for someone who just wants windows to snap reliably.
The paid tier, and why it exists
Rectangle’s continued development is partly funded by Rectangle Pro, a separate paid app built from scratch with its own engine rather than a locked version of the free app. It adds things that are genuinely harder to build — app-specific automatic layouts, pixel-exact custom positioning, window stacking, iCloud sync — while leaving the free app as a complete tool on its own rather than a trial. That structure lets the project fund itself without ever making the core snapping experience worse for people who never pay anything.
Where it stands now
Years after taking over from Spectacle, Rectangle remains the default free recommendation for Mac window management, sitting alongside newer entrants like Loop and long-standing power tools like yabai, each aimed at a different kind of user. It continues to receive updates that keep pace with new macOS releases — including, in recent versions, adjusting to changes like Apple’s own native window tiling introduced in Sequoia — the same kind of ongoing maintenance that Spectacle’s absence once made so noticeable.
Quick timeline
Before Rectangle — Spectacle serves as the popular free, keyboard-driven window snapper.
The gap — Spectacle’s development stalls and the project is archived.
The handoff — Spectacle’s creator recommends Rectangle as the successor.
The build — Rectangle is developed with its own engine, open source under the MIT license.
Today — Rectangle is a default recommendation, funded in part by the paid Rectangle Pro tier, still actively maintained.
The bottom line
Rectangle’s story is a fairly ordinary one in open source software, with an unusually good outcome: a beloved tool got abandoned, someone built a proper successor instead of letting the gap sit empty, and that successor stuck around long enough — and got maintained well enough — to become the thing everyone recommends. Free, auditable, and still getting updates years later is a rarer combination than it should be, which is a large part of why Rectangle ended up where it did.
Whether you use Rectangle app with shortcuts or Rectangle mac for drag-to-snap, both make window management effortless.
Frequently asked questions
Who created Rectangle?
Rectangle was created by developer Ryan Hanson, building on the open-source foundation of an earlier window snapping tool for Mac after that project stopped being maintained.
Is Rectangle a replacement for Spectacle?
Yes. Spectacle was a popular free window snapper that went unmaintained, and its own creator pointed users toward Rectangle as the successor, since Rectangle carried forward the same free, keyboard-first, open-source approach on updated foundations.
Why has Rectangle stayed free instead of going fully paid?
The core app remains free and open source under the MIT license, with a separate paid Rectangle Pro app funding continued development through optional advanced features rather than by charging for the base functionality.
Is Rectangle still actively maintained?
Yes. Unlike some of its predecessors, Rectangle has continued to receive updates that keep it working with new macOS releases, which is part of why it became the default recommendation over alternatives that stalled.