This is the English edition of a review from my Japanese YouTube channel, iestaLife. I review gadgets from my home studio in Japan, so product links go to Amazon Japan.
Quick take
After four years of daily use with the Logitech MX Master 3 (sold as Logicool in Japan), I bought the MX Master 4. The shape and feel are almost unchanged, the clicks are much quieter, and Logi Options+ copied all my MX Master 3 settings in one step. The trade-offs are a slightly heavier body and a higher price.
What I tested
- Logitech (Logicool) MX Master 4, fresh out of the box
- My own MX Master 3, used almost every day for long hours for four years
- Setup with Logi Options+ on a Mac, connected via the included Logi Bolt USB-C receiver
What I found
- The overall shape and size are very close to the MX Master 3. The main visible differences are around the thumb area, a larger side wheel, an extra button, and a semi-transparent top section.
- Clicks are much quieter. The MX Master 3 clicks loudly; the 4 is close to silent (the 3S in between already moved to quiet clicks).
- The surface texture is slightly different — one feels a little softer and rubbery, the other more like plastic — but the grip feels the same. My 3 has developed shiny spots over the years; the 4’s semi-transparent top may resist that better.
- Logi Options+ offered to copy my MX Master 3 settings to the 4. After copying, my scroll direction and wheel settings were exactly as before, so I could use it straight away.
- The new button opens the Action Ring. The mouse gives a small haptic pulse as the cursor moves over each item, and the strength is adjustable. Profiles for installed apps such as Adobe software, Zoom, Final Cut Pro and DaVinci Resolve appeared automatically.
- In the box: the mouse, a Logi Bolt USB-C receiver and a short setup guide. Bluetooth works too.
MX Master 3 vs MX Master 4
| MX Master 3 | MX Master 4 | |
|---|---|---|
 |  | |
| Price in Japan | ¥14,850 (what I paid four years ago) | ¥19,900 (at the time of recording) |
| Weight (my scale) | 143.3 g | 150.8 g |
| Click sound | Loud | Very quiet |
| Haptic feedback | No | Yes (Action Ring) |
Who it’s for
- MX Master 3 or 3S owners who are ready to upgrade — the settings transfer makes it painless
- People who edit video or music and want to assign shortcuts to buttons
- Anyone who wants a mouse that stays comfortable over long sessions
- Not for you if you want a gaming mouse with lots of buttons, or if the lightest possible mouse is your priority
Watch the review
The video is in Japanese. Useful points: 03:00 click sound, 05:04 weight, 06:25 copying settings, 07:45 Action Ring.
Limitations
This is an unboxing and first-day comparison. I had not used the MX Master 4 long term when I recorded it, so durability and battery life are based on my experience with the MX Master 3 only. Prices are Amazon Japan’s at the time of recording.
Products
Logitech (Logicool) MX Master 4: on Amazon Japan
Logitech (Logicool) MX Master 3S (previous model, quiet clicks): on Amazon Japan
The Amazon Japan links above are affiliate links. As an Amazon Associate, I earn from qualifying purchases. Check the listing for the exact model, current price and shipping availability in your region.
More reviews in English
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This review is also available in Japanese.