Rectangle vs SizeUp (2026): which should you pick?

Pick Rectangle if

• Fits if you want windows snapped by shortcut or by drag at no cost
• Works for former Spectacle users who want to keep the same shortcuts

Look elsewhere if

• Skip it if you're on Windows or Linux, as it's macOS only
• Too light for saved workspaces, custom window sizes, window throwing or stashing, which are only in Rectangle Pro
• Not for you if you want your settings synced over iCloud, another Rectangle Pro extra
• Watch out: the website says macOS 10.15 or later, but the GitHub README says the newest release needs macOS 14
• Watch out: Rectangle Pro's price isn't shown as readable text; it has a 10-day trial and a 3-device license

Pick SizeUp if

• Fits if you'd rather resize windows from the keyboard on a Mac
• Works for people with several monitors and Spaces

Look elsewhere if

• Not for you if you're not on a Mac, as no other system is listed
• Watch out: the page doesn't name any macOS release newer than Sonoma
• Skip it if you want drag-to-snap layouts, because it's keyboard-led
• Watch out: the free trial has no stated end, so the page doesn't say what it limits

Rectangle

• macOS only. The website lists macOS 10.15 or later, while the GitHub README says the newest release needs macOS 14.
• Window throwing, custom sizes and positions, saved workspaces, window stashing and iCloud sync are only in Rectangle Pro, a separate paid app.
• Rectangle Pro's price is not shown as readable text on the site. It has a 10-day free trial, and one license can be active on 3 devices.

SizeUp

• Mac only; the page says it is compatible with Mac OS X 10.6 and later, including macOS 14 Sonoma.
• The page does not name any newer macOS release than Sonoma.

Rectangle

Keyboard shortcuts

Move and resize the active window with a shortcut. Repeating a shortcut cycles through window sizes.

Snap areas

Drag a window to a screen edge or corner to snap it, and choose which window action each snap area triggers.

Preset sizes and positions

Commands for halves, quarters, thirds, fourths and sixths, plus maximize, almost maximize, maximize height, smaller, larger, center and restore.

Multiple displays

Next and previous display commands send a window to another screen, and layouts for displays in portrait orientation are supported.

Todo Mode

Keeps one app that you specify visible while you snap and resize other windows. The equivalent in Rectangle Pro is called Pin Mode.

Spectacle-compatible shortcuts

Rectangle is described as nearly a complete drop-in replacement for the Spectacle app, and Spectacle's default shortcuts can be chosen on first run.

SizeUp

Split and quarter actions

Fill the left, right, top or bottom half, or a quarter, of the screen with the frontmost window.

Multi-monitor and Spaces

Move a window to another monitor, optionally resizing it, or to another Space.

SnapBack

Restores a window to the size and position it had before SizeUp changed it.

Margins

Reserve space at screen edges or add gaps between windows.

AppleScript

Build custom actions such as thirds or anchoring a window to an edge.

Global shortcuts

Trigger every action from configurable keyboard shortcuts in any app.

Rectangle

• Rectangle$0

  Keyboard shortcuts, drag-to-snap areas, menu bar commands, halves to sixths, display switching and Todo Mode. Free and open source.

SizeUp

• SizeUp$12.99

  per license

  Includes a 60-day money-back guarantee.