Logitech MX Anywhere 3S vs MX Master 4: Which Productivity Mouse Wins in 2026?

You’ve already decided on Logitech. Smart move — nothing else in this price range tracks as well, scrolls as well, or pairs across as many devices. The question is whether you want the compact MX Anywhere 3S or the full-size MX Master 4.

The spec sheets won’t help you here. Both have 8K DPI sensors, both do MagSpeed scrolling, both pair to three devices, both charge over USB-C. What actually matters is how each one feels under your palm after six straight hours of work — and that’s a different question entirely.

The Short Answer

Get the MX Master 4 if you work 6+ hours a day at one desk, have medium-to-large hands, and want the lowest-fatigue option Logitech makes. The sculpted shape, thumb rest, and gesture button are worth the extra $50.

Get the MX Anywhere 3S if you travel, hot-desk, work from cafes, or have small hands. It’s $50 cheaper, fits in a jacket pocket, and tracks on glass — which the Master 4 still doesn’t.

That’s the honest version. Now the nuance.

Where the Anywhere 3S Wins

Portability That Actually Matters

The Anywhere 3S is genuinely pocketable. Not “fits in a laptop bag” pocketable — actually slips into a coat pocket. If you commute, travel for work, or move between home and an office, this matters more than any feature comparison.

Glass Tracking

The Anywhere 3S has Logitech’s Darkfield sensor that works on glass surfaces (4mm minimum thickness). The Master 4 doesn’t. If your desk has a glass top, this decision is already made.

Price

At around $50 less than the Master 4, the Anywhere 3S delivers most of the productivity features at a meaningfully lower price. For a secondary mouse or a budget-conscious primary, it’s the better value.

Small Hands

If you have small hands or use a claw grip, the Master 4’s sculpted shape can feel oversized and force your wrist into an awkward angle. The Anywhere 3S is grip-agnostic.

Where the Master 4 Wins

Hand Fatigue Over Long Sessions

This is the real reason to spend the extra money. The Master 4’s sculpted shape supports your palm and keeps your wrist neutral. The Anywhere 3S is essentially a flat puck — fine for an hour, tiring after six.

If you’re at your desk all day, the ergonomic difference is not marginal. It’s the difference between ending the day with a sore hand and not thinking about your mouse at all.

The Thumb Wheel

The Master 4 has a horizontal thumb wheel that the Anywhere 3S lacks. For anyone working in spreadsheets, video timelines, design tools, or wide codebases, horizontal scrolling without holding Shift is a quiet productivity unlock you stop noticing — until you go back to a mouse that doesn’t have it.

Battery Life

The Master 4 lasts roughly 70 days on a charge versus the Anywhere 3S’s ~30 days. Not life-changing, but real.

Gesture Button

The thumb-actuated gesture button on the Master 4 maps to window management, virtual desktops, or whatever you assign in Logi Options+. Once you’ve trained yourself to use it, it’s hard to give up.

Mac Users: One More Consideration

If you’re on macOS, also look at the MX Master 4 for Mac. It ships with Mac-optimized defaults, a Space Gray finish that matches Apple hardware, and the same hardware as the standard Master 4. Functionally identical, cosmetically nicer if you care about that.

What About the MX Master 3S?

The MX Master 3S is still available and now sits at a permanent discount versus the Master 4. If you don’t need the Master 4’s updated Actions Ring or the slightly refined shape, the 3S delivers 90% of the experience for less money. It’s the value pick in the full-size lineup.

Who Should Buy Which

Buy the MX Anywhere 3S if: you travel, you have a glass desk, you have small hands, you want a great secondary mouse, or you simply don’t spend enough hours at one desk for ergonomics to matter.

Buy the MX Master 4 if: you work full days at one desk, you do heavy spreadsheet/timeline/design work, you have medium-to-large hands, or you’ve noticed your wrist getting tired by mid-afternoon.

Buy the MX Master 3S if: the Master 4 is what you want but the price stings, and you can live without the latest gesture features.

The Anywhere wins on flexibility. The Master wins on endurance. Pick the one that matches how you actually work — not the one with the longer spec sheet.