Mos review (2026): is it any good?
Free Mac menu bar utility for smooth mouse wheel scrolling
Mos report card
Very good · out of 4.0 · graded Nov 13, 2026
Best for smoother mouse wheel scrolling on a Mac
Mos smooths mouse wheel scrolling on a Mac and keeps settings per app, and it's free. But it needs the Accessibility permission, its CC BY-NC licence is non-commercial, and it is Mac only.
Who Mos is for
- Fits if you use a wheel mouse on a Mac and want it to scroll like a trackpad
- Works for per-app scroll settings
Who Mos is not for
- Not for you if you use Windows or Linux, as it is Mac only
- Watch out: the CC BY-NC 4.0 licence is non-commercial, not a standard open source one
- Too light for you if you want paid support: its own comparison page points those users to commercial tools
- Watch out: it needs the macOS Accessibility permission
Why Mos gets a 3.2
Five grades, each with its reason. The GPA is their average: an A is 4 points, an F is none.
- AValue for moneyFree to use, with a donate link offered, and no paid plan is listed on the site.
- AFree plan and trialThe whole app is free, with no paid edition, limit or trial on record.
- BFeaturesSmooth scrolling, per-app profiles, separate axes, button bindings and Logitech support. Nothing in the listing is missing from the job, though pointer acceleration is left to other tools.
- BEase of useA menu bar app that works once the Accessibility permission is granted. No store rating is on record.
- CPlatforms and integrationsMac only. No Windows, Linux or phone version.
What these grades rest on. Graded from this listing, whose facts were read from Mos's own pages on 13 November 2026. Not based on using the product, and shorter than our full reviews. How we review and grade.
Make Mos? Put this grade on your site
Paste this where you want the badge. It links here and follows the grade if it changes. About badges
<a href="https://toolgpa.com/tools/mos#review"><img src="https://toolgpa.com/badge/mos.svg" alt="Mos: 3.2 GPA on ToolGPA" width="196" height="56"></a>Where Mos stands among desktop utilities
Mos's GPA of 3.2 is higher than 182 of the 186 other desktop utilities we grade, and level with 4.
It stands best on free plan and trial (A, above 107 of 186) and worst on platforms and integrations (C, above 111).
Mos has no paid plan.
On features, ease of use and platforms it scores 2.7 out of 4, and no tool on the category's chart scores higher without costing more.
Each grade against the category
Every bar is all 187 desktop utilities we grade, cut by the letter each got. Mos’s own letter is outlined.
- AValue for moneyAbove 55 of 186, level with 131
- AFree plan and trialAbove 107 of 186, level with 79
- BFeaturesAbove 113 of 186, level with 72
- BEase of useAbove 78 of 186, level with 108
- CPlatforms and integrationsAbove 111 of 186, level with 60
Price against what you get
Each dot is one of 103 desktop utilities. Further left costs less, and higher up scores better on features, ease of use and platforms. Point at a dot to see which tool it is.
Features, ease of use and platforms, averaged
What paid plans start at, a month (each step along is roughly double) →
- The best score at each price
- Has a free plan
- No free plan
Keep Mos, or make your own?
Keep it
Mos is free, so making your own would save you nothing.
And it is not the kind of software a weekend replaces. It is one of the better ones too: its GPA of 3.2 is higher than 182 of the 186 other desktop utilities we grade.
What you could not
- Keys and buttons remapped below the level of apps.
- 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. Mos’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.
What is Mos?
Mos is a macOS menu bar app that smooths out mouse wheel scrolling so it moves more like a trackpad. It keeps scroll settings per app, lets vertical and horizontal scrolling be tuned separately, and can bind mouse buttons to actions. The vendor describes it as free and open source.
Worth knowing
- Mac only; it needs the macOS Accessibility permission to work.
- Licensed under CC BY-NC 4.0, which is a non-commercial license rather than a standard open source one.
- Its own comparison page says users who want paid support or a commercial product lifecycle may prefer commercial tools.
- Pointer acceleration and broader device settings are better handled by other tools, according to the vendor.
Key features
- Smooth wheel scrolling
- Turns raw wheel steps into continuous motion, with step, speed and duration values that can be tuned.
- Per-app profiles
- Each app can inherit the defaults or override its own scroll and button behavior.
- Separate axes and reversal
- Vertical and horizontal scrolling are configured independently, and direction can be reversed per axis.
- Mouse button bindings
- Record a mouse, keyboard or custom event and bind it to an action such as Mission Control, Spaces, screenshots or a script.
- Logitech button support
- Handles button events from Logitech devices connected over Bolt, Unifying or Bluetooth.
- Scroll hotkeys
- Keys can be bound to accelerate scrolling, convert the axis or temporarily turn smoothing off.
Mos pricing
As of Nov 13, 2026, Mos is free to use.
- Starts at
- Free
- Free plan
- The whole app is free; a Donate link is offered.
- Free trial
- None listed
| Plan | Price | What you get |
|---|---|---|
| Free | $0 | Full app, distributed through GitHub Releases and Homebrew. |
Read from mos.caldis.me on Nov 13, 2026. Prices change, so confirm with Mos before you buy.
Works with
- Logitech
Mos alternatives
- Mos vs Mac Mouse Fix
Free trial · from $2.99 one-time
- Mos vs Smooze
Free trial · from $19.99 one-time
- Mos vs SteerMouse
Free trial · from $19.99 one-time
Common questions
Does Mos have an Android app?
No Android app was listed when its pages were read on Nov 13, 2026. Mos is listed for macOS.
Does Mos have an iPhone app?
No iPhone app was listed when its pages were read on Nov 13, 2026. Mos is listed for macOS.
Is Mos open source?
Yes. Mos is open source, according to its own site.
Sources for this page
The prices, plans, platforms and features above were read from these pages on Nov 13, 2026.