Mos vs Scroll Reverser (2026): which should you pick?
As of Nov 13, 2026, Mos grades higher than Scroll Reverser: 3.2 against 3.0 out of 4.0.
Checked Nov 13, 2026 · graded Nov 13, 2026 by ToolGPA
Mos grades higher on features. They get the same grade on value for money, the free plan, ease of use and platforms.
Price, platforms and features side by side. The table says where each price was read and when.
Which one is for you
Pick Mos if
- Fits if you use a wheel mouse on a Mac and want it to scroll like a trackpad
- Works for per-app scroll settings
Look elsewhere if
- 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
Pick Scroll Reverser if
- Fits if you use a trackpad and a mouse on the same Mac and want opposite scroll directions
- Works for people who want an AppleScript on/off switch
Look elsewhere if
- Skip it if you want swipe gestures reversed, as they follow the system Scroll Direction setting
- Not for you if you use Windows or Linux, since it is Mac only
- Watch out: it doesn't work in iPhone Mirroring or Calendar, which scroll by gesture
- Watch out: it needs macOS 13.5 or later
How we grade them
| 3.2GPAMosVery good | 3.0GPAScroll ReverserVery good | |
|---|---|---|
| Value for money | AFree to use, with a donate link offered, and no paid plan is listed on the site. | AFree under Apache 2.0, with voluntary donations. |
| Free plan and trial | AThe whole app is free, with no paid edition, limit or trial on record. | AThe whole app is free, and donations are voluntary, so nothing is charged on record. |
| Features | BSmooth 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. | CSeparate direction per device, horizontal control and wheel step size. It does that job fully, but it is a smaller one. |
| Ease of use | BA menu bar app that works once the Accessibility permission is granted. No store rating is on record. | BInstall and tick a box: nothing to set up. No store rating is on record. |
| Platforms and integrations | CMac only. No Windows, Linux or phone version. | CMac only, macOS 13.5 or later for version 2.1.1. Intel and Apple silicon builds. |
| Best for | smoother mouse wheel scrolling on a Mac | different scroll directions for mouse and trackpad |
The GPA is the average of the five grades: an A is 4 points, an F is none. The full reasons are on each tool's page: Mos and Scroll Reverser. How we grade
Price against what you get
Mos has no paid plan and scores 2.7 out of 4 on features, ease of use and platforms. Scroll Reverser has no paid plan and scores 2.3.
Mos scores higher for the same starting price. Of the other desktop utilities on the chart, none scores higher than Mos for less, and none scores higher than Scroll Reverser for less.
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
Where they differ
In commonFree planmacOSOpen sourceMenu bar appKeyboard and mouse remapping
At a glance
| Mos | Scroll Reverser | |
|---|---|---|
| Pricing | Free | Free |
| Starts at | Free | Free |
| Free plan | The whole app is free; a Donate link is offered. | The whole app is free; the author accepts voluntary donations. |
| Free trial | None listed | None listed |
| macOS | ||
| Made by | Caldis | Pilotmoon Software |
| Price read from | mos.caldis.me | pilotmoon.com |
| Checked | Nov 13, 2026 | Nov 13, 2026 |
Worth knowing
Mos
- 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.
Scroll Reverser
- Swipe gestures cannot be reversed; they follow the system Scroll Direction setting.
- Does not work in iPhone Mirroring or Calendar, which use gesture-based scrolling rather than scroll events.
- Version 2.1.1 requires macOS 13.5 or later; the page lists Intel and Apple silicon builds.
- Mac only, with no Windows or Linux version.
Key features
Mos
- 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.
Scroll Reverser
- Separate direction per device
- Choose Natural, Classic or Unchanged for each trackpad and mouse. By default trackpads use Natural and mice use Classic.
- Horizontal scrolling control
- Horizontal scrolling follows the vertical setting by default and can be set to Reversed or Unchanged in the settings popover.
- Step size for wheel mice
- Scrolls a fixed number of lines with each wheel click instead of macOS scroll acceleration. The control can be turned off.
- Scrolling from apps
- Scroll events that come from other apps, such as remote access software, can be reversed or left unchanged.
- AppleScript on/off switch
- An enabled property lets a script turn the app on or off.
Plans
Mos
Free$0
Full app, distributed through GitHub Releases and Homebrew.
Scroll Reverser
Free$0
Full app, open source under Apache 2.0. Voluntary donations are accepted.
Common questions
Which is cheaper, Mos or Scroll Reverser?
As of Nov 13, 2026, both Mos and Scroll Reverser are free to use.
Which has a free plan, Mos or Scroll Reverser?
As of Nov 13, 2026, both Mos and Scroll Reverser have a free plan.
More comparisons
How this page was made
- The verdict at the top follows a fixed rule. When both tools are in the same category and either is in our top three for it, the verdict follows that ranking: the higher-placed tool is our pick. The top three weigh who each tool suits as well as its grades, so a pick can go against the GPA. Otherwise the page does not pick one and says which grades higher: the higher GPA first; on a tie, the one with a free plan, then the one that starts cheaper in dollars a month, counted the same way for both; if they are still level, what the choice depends on.
- The grades are our own, from each tool’s review or report card. The GPA is their average.
- Prices, plans and platforms come from each tool’s listing. The table above says where each price was read and when.
- The differences and the answers to the questions are worked out from those listings.