Here's the short answer: for most people, it's an extra thing to carry. Your laptop keyboard is fine. You don't need a second keyboard in your bag. But there are two specific cases where a mobile keyboard genuinely earns its place: you type on a tablet or phone as your primary device, or you write for a living and your laptop keyboard is actively hurting you. If you fall into one of those two categories, the Logitech Keys-To-Go 2 ($70) is the best answer for most people, and the ProtoArc XKM01 Pro ($99) is the best answer if you want a full-size layout.

Now let me explain why I talk most people out of this purchase, and when I don't.

The Fantasy vs. the Reality

The fantasy is compelling. You're sitting in a café. You pull out a slim, folding keyboard. You connect it to your laptop. You type faster, more comfortably, with better posture. You look like someone who takes their work seriously.

The reality is less compelling for most people. You pull out the keyboard. You connect it. You realize the table is now entirely covered by a laptop, a keyboard, and a coffee cup. You realize you have to pack it up every time you leave. You realize that after a week, you've stopped taking it out of the bag.

I've watched this happen. I've done it myself. The mobile keyboard is one of the most commonly bought and least commonly used accessories in the hybrid work category.

So before you buy one, you need to answer one question honestly: what device are you typing on?

When a Mobile Keyboard Makes Sense

There are exactly two situations where I recommend a mobile keyboard.

Situation one: You type on a tablet or phone as your primary device.

If you work from an iPad, a Samsung Galaxy Tab, or even your phone, you need a physical keyboard. The on-screen keyboard is fine for a sentence or two. It's terrible for an email, a document, or anything longer than a text message. If your tablet is your computer, a mobile keyboard isn't an accessory. It's a necessity.

The Logitech Keys-To-Go 2 ($70) is the best option for this. It weighs 7.8 ounces, which is so light you'll forget it's in your bag. It has a protective cover that doubles as a stand for your tablet or phone. It connects to three devices and switches between them with a button press. The keys have 1mm of travel, which is enough to feel responsive without being bulky.

The keyboard is about the size of a magazine cut in half. It fits in any bag that has room for a tablet. It charges via USB-C and lasts for months on a charge. The only learning curve is the smaller size—the half-width dash and equals keys take a day or two to get used to. After that, it's fine.

Situation two: You write for a living and your laptop keyboard is actively hurting you.

If you type 2,000 words a day and your wrists ache after an hour, the problem might be your laptop keyboard. Laptop keyboards are thin for portability reasons. They have short key travel—usually around 1.3mm. A good standalone keyboard has 2mm or more of travel, which means less finger fatigue over long sessions.

The ProtoArc XKM01 Pro ($99) is the answer here. It's a full-size foldable keyboard with a number pad, function keys, and 105 keys total. It folds to 8.46 inches by 4.68 inches and comes with a mouse, a phone stand, and a carrying case. The aluminum hinges snap open when fully extended, and the keyboard lies flat on the desk with rubberized stops to keep it in place. It has three levels of white backlighting, which is useful for evening work in a dim café.

The typing feel is the point. The scissor-switch keys have more travel than a laptop keyboard, and the full-size layout means your hands aren't cramped. If you're typing 2,000 words a day and your hands hurt at the end, this keyboard will change that.

When It's Dead Weight

Here's who should not buy a mobile keyboard: anyone whose laptop is their primary device and who doesn't have wrist pain.

Your laptop keyboard works. It's not great, but it's not the problem. The problem is that adding a keyboard to your bag means:

• One more thing to pack and unpack every session

• More table space used in a café

• More weight in your bag (the Keys-To-Go 2 is 7.8 ounces; the XKM01 Pro is heavier with the mouse and case)

• One more device to charge

• One more thing to forget on the table when you leave

I've carried a mobile keyboard in my bag for three months. I used it four times. The other times, I opened my laptop and typed on the laptop keyboard because it was faster and simpler. The keyboard became the thing I moved out of the way to get to my charger.

The math is simple: if you're already carrying a laptop with a keyboard, the second keyboard has to be significantly better than the first one to justify its weight and space. For most people, it isn't.

The Table Space Problem

This is the practical objection that no product review mentions.

A café table is 24 to 30 inches wide. A laptop takes up about 12 to 14 inches. A mobile keyboard takes up another 10 to 12 inches. A coffee cup takes up 4 inches. A notebook takes up 8 inches.

You can't fit all of that on a standard two-top. You can fit a laptop and a coffee. You can fit a laptop and a keyboard. You can't fit a laptop, a keyboard, a coffee, and a notebook.

So if you bring the keyboard, something else has to go. Usually, it's the coffee. Or the notebook. Or your elbow room. The keyboard solves one problem—typing comfort—and creates another—table congestion.

What About the Folding Keyboards?

Folding keyboards like the Mobile Pixels Foldable Keyboard ($40) and the ProtoArc XK04 ($40) solve the size problem by folding in half. The Mobile Pixels keyboard is about 10 inches long when open, with keys that are roughly 0.5 by 0.5 inches—about the same size as a small laptop keyboard. It's just under an inch thick folded, so it fits in a crossbody bag or a large pocket.

The tradeoff is the hinge. The ProtoArc XK04 has a lower hinge that some users report rubbing against their hand when typing. One reviewer noted the hinge "rubbed against my hand when typing" and returned it for the larger XK01. The Mobile Pixels keyboard has a similar folding design, and while it works, the hinge is always there, in the middle of the keyboard, where your palms rest.

If you're typing short emails, this is fine. If you're typing for hours, the hinge will bother you.

What About the Full-Size Folding Keyboards?

The ProtoArc XK01 and the XKM01 Pro are the best of both worlds. They fold into a small package but open into a full-size keyboard with a number pad. The XKM01 Pro adds backlighting and comes with a mouse.

The tradeoff is weight and bulk. The XKM01 Pro with the mouse, the stand, and the case is a complete kit. It's not something you slip into a jacket pocket. It's something you commit to carrying in your bag.

If you're already carrying a laptop, a charger, a battery pack, and a tech pouch, adding a keyboard kit is another pound and another bag compartment.

What I Recommend, By Situation

What I Don't Recommend

• A mobile keyboard if your laptop is your primary device and you're comfortable typing on it. You won't use it. It'll live in your bag.

• A folding keyboard with a center hinge if you type for hours. The hinge will bother you. It's fine for short sessions, not for long ones.

• A keyboard that requires a dongle. Bluetooth multi-device switching is the point. A dongle is one more thing to lose.

• A keyboard that doesn't come with a case or cover. The keys will get damaged in your bag. The case is not optional.

• A keyboard that weighs more than 10 ounces. If it's heavier than your laptop's power adapter, you'll feel it.

• Buying a keyboard before you've tried working without one. Do a month of café work with just your laptop. If you constantly wish you had a better keyboard, buy one. If you don't, don't.