# Mos review (2026): is it any good? > Free Mac menu bar utility for smooth mouse wheel scrolling Checked Nov 13, 2026 ยท graded Nov 13, 2026 by ToolGPA. 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. - **Category:** Desktop Utilities - **Made by:** Caldis - **Website:** https://mos.caldis.me/ - **Runs on:** macOS - **Who should skip it:** Not for you if you use Windows or Linux, as it is Mac only. - **Facts last checked:** Nov 13, 2026 ## Pricing As of Nov 13, 2026, Mos is free to use. - **Pricing model:** 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 https://mos.caldis.me/ on Nov 13, 2026. Prices change, so confirm with Mos before buying. ## 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. ## Good for - Mac users who prefer a mouse but want trackpad-like scrolling - People who need different scroll feel in different apps - Logitech mouse owners who want to remap extra buttons on macOS ## 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. ## ToolGPA grades **GPA: 3.2 out of 4**, graded Nov 13, 2026. 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. - **Value for money: A.** Free to use, with a donate link offered, and no paid plan is listed on the site. - **Free plan and trial: A.** The whole app is free, with no paid edition, limit or trial on record. - **Features: B.** Smooth 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. - **Ease of use: B.** A menu bar app that works once the Accessibility permission is granted. No store rating is on record. - **Platforms and integrations: C.** Mac only. No Windows, Linux or phone version. These are ToolGPA's own grades. 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. ## Where it 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. The category's chart of price against score: https://toolgpa.com/charts/utilities ## Keep it, 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. - You could not: Keys and buttons remapped below the level of apps. - You could not: A native app living in the menu bar. - You could not: A real app for macOS. Something home-made would be a web page. - You could not: The depth: we grade its features B, which means it covers the whole job. A judgement by ToolGPA from this listing, by rules that are the same for every tool. Nothing was built to test it. ## Works with Logitech **Tags:** Open source, Keyboard and mouse remapping, Menu bar app ## Alternatives - [Scroll Reverser](https://toolgpa.com/tools/scroll-reverser): Mac menu bar app that sets scroll direction per device. [Compare](https://toolgpa.com/compare/mos-vs-scroll-reverser) - [LinearMouse](https://toolgpa.com/tools/linearmouse): Free, open-source mouse and trackpad customizer for Mac. [Compare](https://toolgpa.com/compare/linearmouse-vs-mos) - [Mac Mouse Fix](https://toolgpa.com/tools/mac-mouse-fix): Trackpad-style gestures and smooth scrolling for third-party mice. [Compare](https://toolgpa.com/compare/mac-mouse-fix-vs-mos) - [Smooze](https://toolgpa.com/tools/smooze): Mac app for smooth scrolling and mouse button actions. [Compare](https://toolgpa.com/compare/mos-vs-smooze) - [SteerMouse](https://toolgpa.com/tools/steermouse): Mac utility for customizing mouse buttons, wheels and cursor speed. [Compare](https://toolgpa.com/compare/mos-vs-steermouse) ## Sources The prices, plans, platforms and features above were read from these pages on Nov 13, 2026: - https://mos.caldis.me/ - https://mos.caldis.me/llms-full.txt Page: https://toolgpa.com/tools/mos Listed by ToolGPA (toolgpa.com).