March 13, 2026
Clicks, not tricks
Mouser: An open source alternative to Logi-Plus mouse software
Open‑source “Mouser” has users cheering while dunking on Logitech’s bloated app
TLDR: Mouser is a simple, local replacement for Logitech’s app that remaps buttons without accounts or cloud stuff, and users love it. The comments turned into a victory lap for open tools and battery life, with Mac and Linux fans shouting out their favorites while roasting Logitech’s bloated software.
The people have spoken: Mouser, a tiny open‑source tool that remaps every button on the beloved Logitech MX Master 3S, just became the crowd’s new crush. Why? No cloud, no account, no telemetry—just per‑app button profiles, scroll tweaks, and DPI control that all run on your computer. The applause is loud, but the roast of Logitech’s official app is louder. One fan summed up the mood with a zinger about the stock software “sucking the electrons out of a battery,” and the thread never looked back.
Commenters piled in with a platform roll call. Mac users waved their own flags: longtime devotees of SteerMouse chimed in, while others swore by MacMouseFix (“it’s $2.99, totally worth it”) and name‑dropped LinearMouse and Mos. Linux folks flexed too: “we’ve got Piper + libratbag.” It turned into a joyful “choose your fighter” list, united by one theme: Logitech makes great hardware and infamously clunky software.
There was some side‑eye about Mouser being tested only on the MX Master 3S for now, but most were happy to see an independent dev step in where a corporate giant hasn’t. The vibe: privacy over bloat, tiny app over megasuite, and a whole lot of jokes about batteries escaping with their lives. The community’s verdict? Clicks cured, drama served.
Key Points
- •Mouser is an open‑source, fully local button remapper for the Logitech MX Master 3S, positioned as an alternative to Logitech Options+.
- •Supports Windows 10/11 and macOS 12+, with macOS integration via CGEventTap, Quartz CGEvent, and NSWorkspace, requiring Accessibility permission.
- •Remaps six programmable buttons, offers per‑application profiles, 22 built‑in actions, DPI control (200–8000), scroll inversion, and gesture button support via HID++.
- •Built with a Qt Quick UI featuring an interactive mouse diagram, system tray mode, auto‑reconnection, live connection status, and local JSON config.
- •Easy setup: download a 44 MB zip and run Mouser.exe; ensure Logitech Options+ isn’t running; config stored at %APPDATA%\Mouser; source setup uses Python 3.10+.