The SizeUp Insider’s Guide
Everything we know about SizeUp in one document: what it costs, its grades, getting a refund, getting help and what else to look at. Read it here, or keep a copy.
SizeUp
The Insider’s Guide
Keyboard-driven window resizing for the Mac
Every plan, grade, refund rule and rival among window managers and launchers, read from SizeUp’s own pages.
Made by Irradiated Software · checked Nov 12, 2026 · toolgpa.com
Contents
- 01WelcomeWhat it is, who it suits, its grades and the ten things to know first
- 02What it costsEvery plan, the free plan, ways to pay less and how prices have moved
- 03What it doesIts main features, where it runs, what it works with and who makes it
- 04Where it standsIts grades against its category, and whether to keep it or make your own
- 05The alternativesThe tools it is most often weighed against, side by side
- 06Quick answersThe questions people ask about it, each answered in a line or two
- 07About ToolGPAWho made this guide, what else is on the site, and how to cite it
ToolGPA put this guide together from SizeUp’s own pages, its app-store listings and our grades. Every fact in it is on SizeUp’s page too, where it is kept up to date. Checked Nov 12, 2026.
Part 01 · Overview
Welcome
What it is, who it suits, its grades and the ten things to know first
2.4
GPA, above 7 of the 28 other window managers and launchers we grade
SizeUp resizes and positions the frontmost Mac window through global keyboard shortcuts or a menu bar icon. Actions cover halves, quarters, full screen, moving between displays and Spaces, and restoring a window's earlier size. It also accepts AppleScript for custom actions.
To get you started, here are 9 things to know about SizeUp, taken from its own pages and our grades.
It's driven by shortcuts you have to learn.
- 1
Best for keyboard shortcuts for window sizes
SizeUp moves and resizes Mac windows with keyboard shortcuts or a menu bar icon, for $12.99, with an unlimited free trial.
- 2
What it costs
Paid plans start at $12.99.
- 3
You can try it first
Unlimited free trial, per the product page.
- 4
It runs on macOS
macOS.
- 5
Split and quarter actions
Fill the left, right, top or bottom half, or a quarter, of the screen with the frontmost window.
- 6
Multi-monitor and Spaces
Move a window to another monitor, optionally resizing it, or to another Space.
- 7
SnapBack
Restores a window to the size and position it had before SizeUp changed it.
- 8
A 2.4 GPA, above 7 of 28
That is against the other window managers and launchers we grade, on value, the free plan, features, ease of use and platforms.
- 9
Keep it
To replace SizeUp you would be making control over other apps' windows. That is not a weekend's work, with an AI app builder or without one.
SizeUp at a glance
- Pricing
- Free trial, from $12.99
- Free plan
- No
- Free trial
- Unlimited free trial, per the product page.
- Runs on
- macOS
- Made by
- Irradiated Software
- Category
- Window Managers & Launchers
- Our grade
- 2.4 GPA, fair
The report card
Best for keyboard shortcuts for window sizes
SizeUp moves and resizes Mac windows with keyboard shortcuts or a menu bar icon, for $12.99, with an unlimited free trial. It's Mac only, and the page names nothing newer than macOS 14 Sonoma.
| Subject | Grade | Comment |
|---|---|---|
| Value for money | B | $12.99 per license, below the $16 middle of one-time prices in this category, with a 60-day money-back guarantee. |
| Free plan and trial | B | An unlimited free trial, per the product page, though it's a trial and not a free plan. |
| Features | B | Halves, quarters, multi-monitor and Spaces, SnapBack, margins, AppleScript and global shortcuts. Nothing in the listing shows a gap in the core job. |
| Ease of use | C | No store rating on record. It's driven by shortcuts you have to learn. |
| Platforms and integrations | D | Mac only, from Mac OS X 10.6 through macOS 14 Sonoma. |
An A is worth 4 points, a B 3, a C 2, a D 1 and an F nothing. The GPA is the average of the five.
Who SizeUp is for
- Fits if you'd rather resize windows from the keyboard on a Mac
- Works for people with several monitors and Spaces
Who it is not for
- 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
Good to know
Good for
- Mac users who prefer keyboard shortcuts to dragging
- People who want to script their own window layouts
Worth knowing
- 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.
Part 02 · Pricing
What it costs
Every plan, the free plan, ways to pay less and how prices have moved
$12.99
To start
SizeUp is a paid product with a free trial, starting at $12.99.
An unlimited free trial, per the product page, though it's a trial and not a free plan.
SizeUp
$12.99
per license
Includes a 60-day money-back guarantee.
Trying it first
Unlimited free trial, per the product page.
Read from irradiatedsoftware.com on Nov 12, 2026.
Part 03 · Features
What it does
Its main features, where it runs, what it works with and who makes it
1
Place it runs: macOS
Keyboard-driven window resizing for the Mac. Here is what it does, as its own site describes it, and what it covers: keyboard-first, window management, menu bar app.
Halves, quarters, multi-monitor and Spaces, SnapBack, margins, AppleScript and global shortcuts.
- 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.
Where it runs
- macOS
What it works with
Its own pages name no integrations.
SizeUp is made by Irradiated Software.
Part 04 · Standing
Where it stands
Its grades against its category, and whether to keep it or make your own
7/28
Other window managers and launchers it is graded above
SizeUp's GPA of 2.4 is higher than 7 of the 28 other window managers and launchers we grade, and level with 6.
It stands best on features (B, above 20 of 28) and worst on platforms and integrations (D, above 0).
Each grade against the category
Every bar is all 29 window managers and launchers we grade, cut by the letter each got. SizeUp’s own letter is outlined.
- BValue for moneyAbove 3 of 28
- BFree plan and trialAbove 9 of 28
- BFeaturesAbove 20 of 28
- CEase of useAbove 3 of 28
- DPlatforms and integrationsAbove 0 of 28
Keep it, or make your own?
Whether this is something you could build for yourself with an AI app builder, and what you would give up.
Keep it
To replace SizeUp you would be making control over other apps' windows. That is not a weekend's work, with an AI app builder or without one.
That makes this kind of software worth paying for, not this one in particular: 15 of the 28 other window managers and launchers grade higher.
What you could not
- Control over other apps' windows.
- A native app living in the menu bar.
- A real app for macOS. Something home-made would be a web page.
- The depth: we grade its features B, which means it covers the whole job.
What this rests on. SizeUp’s listing: what it does, where it runs, what it plugs into and what it costs. It is a judgement about the kind of software this is. We have not built a replacement for it, and making your own means looking after it too. How we decide, and every tool’s verdict.
Part 05 · Alternatives
The alternatives
The tools it is most often weighed against, side by side
Magnet, Rectangle, Moom and Divvy
The 4 tools SizeUp is most often weighed against, with where each one differs from it.
- 2.0GPA
Magnet
From $4.99 one-time
Window snapping for Mac by drag, shortcut or menu bar.
- Magnet can be bought with a one-time purchase.
- 2.8GPA
Rectangle
Free
Free, open-source window snapping for macOS.
- Rectangle has a free plan. SizeUp does not, though it has a free trial.
- Rectangle is open source, according to its own site.
- SizeUp also covers menu bar app.
- 2.2GPA
Moom
Free trial · from $15 one-time
Mac window manager with saved layouts, snapping and a palette.
- Moom can be bought with a one-time purchase.
- 2.2GPA
Divvy
Free trial · from $13.99
Window resizing by dragging across a grid, for Mac and Windows.
- Only Divvy lists a Windows app.
- SizeUp also covers menu bar app.
Part 06 · Questions
Quick answers
The questions people ask about it, each answered in a line or two
10
Questions, each answered in a line or two
The short version of everything above, for when you only need the answer. Each one is told in full in its part of the guide.
Is SizeUp free?
No, SizeUp is a paid product, but you can try it first. Unlimited free trial, per the product page.
How much does SizeUp cost?
SizeUp lists one plan. SizeUp: $12.99 per license.
What platforms does SizeUp work on?
SizeUp is available on macOS.
Does SizeUp have an Android app?
No Android app was listed when its pages were read on Nov 12, 2026. SizeUp is listed for macOS.
Does SizeUp have an iPhone app?
No iPhone app was listed when its pages were read on Nov 12, 2026. SizeUp is listed for macOS.
Is SizeUp open source?
SizeUp is not described as open source on its own site, as read on Nov 12, 2026.
Who makes SizeUp?
SizeUp is made by Irradiated Software.
What are the alternatives to SizeUp?
The closest alternatives to SizeUp in our directory are Magnet, Rectangle, Moom and Divvy.
How does SizeUp compare with other window managers and launchers?
SizeUp's GPA of 2.4 is higher than 7 of the 28 other window managers and launchers we grade, and level with 6.
Could I make my own version of SizeUp?
To replace SizeUp you would be making control over other apps' windows.
Where this guide comes from
The prices, plans, platforms and features were read from SizeUp’s own pages on Nov 12, 2026, and the grades were given on Nov 12, 2026. Graded from this listing, whose facts were read from Irradiated Software's own pages on 12 November 2026. Not based on using the product, and shorter than our full reviews.
Every tool we list gets five grades, A to F, each with its reason, and a GPA that averages them. How each is decided is at toolgpa.com/grades. This guide is ToolGPA’s own work; it is not made, paid for or approved by Irradiated Software. Prices change, so check irradiatedsoftware.com before you buy.
Part 07 · About
About ToolGPA
Who made this guide, what else is on the site, and how to cite it
5,038
Tools graded, in 95 categories
ToolGPA grades software the way a school report grades a pupil: five subjects, a letter for each with the reason written beside it, and a GPA that averages them. Prices, plans and platforms are read from each maker’s own pages and dated, so you always know how fresh a figure is.
Every grade, review and ranking on ToolGPA is our own judgement. No company can pay for a grade or change one. Every tool on the site has a guide like this one, free to download and pass on. It all lives at toolgpa.com.
5,038
tools graded
95
categories
739
price changes on record
579
apps priced in 12 countries
What else is on toolgpa.com
- SizeUp, kept up to dateEverything in this guide, with prices and grades as they are todaytoolgpa.com/tools/sizeup
- How grades are givenThe rules behind every letter and every GPAtoolgpa.com/grades
- Value chartsWhat each tool costs against what it scores, for every categorytoolgpa.com/charts
- CompareAny two tools side by side, plan by plantoolgpa.com/compare
- Price changesEvery price rise and cut on record, each with its sourcetoolgpa.com/price-changes
- Prices by countryWhat apps cost on the App Store in 12 countriestoolgpa.com/prices-by-country
- Pay lessEvery public discount: yearly billing, students, nonprofitstoolgpa.com/save
- Keep or makeWhich tools are worth paying for, and which you could build yourselftoolgpa.com/keep-or-make
Scan for the live page
Prices and grades as they are today
Quoting this guide?
Please name ToolGPA and link to the live page, so readers can check the figures for themselves:
ToolGPA, "SizeUp: The Insider's Guide", checked Nov 12, 2026. https://toolgpa.com/tools/sizeup
Know someone choosing between window managers and launchers?
Send them this guide: toolgpa.com/tools/sizeup/guide
ToolGPA elsewhere: youtube.com/@toolgpa
See our other guides
The best-graded window managers and launchers after SizeUp, each with an Insider's Guide of its own.
- Window Managers & Launchers Insider's GuideEvery one of the 29 window managers and launchers we grade, compared
- Flow Launcher Insider's GuideFree, open-source app launcher and file search for Windows3.0 GPA
- DockDoor Insider's GuideFree Dock window previews and Alt-Tab switcher for macOS2.8 GPA
- Loop Insider's GuideFree, open-source macOS window manager with a radial menu2.8 GPA
Choosing software? Every tool graded, every price dated.
Compare tools at toolgpa.com ›Everything in this guide is ToolGPA’s own summary of what SizeUp’s pages, its app-store listings and public reviews said on the dates shown. Grades are our judgement under the rules at toolgpa.com/grades. Every grade, review and ranking on ToolGPA is our own judgement. No company can pay for a grade or change one. SizeUp is a trademark of its owner, and this guide is not made, paid for or approved by Irradiated Software. Prices and plans change: check irradiatedsoftware.com before you buy.