Coldcard MK5 Review: Coinkite Refines Its Flagship Bitcoin Wallet

Coinkite, the Bitcoin-only hardware wallet manufacturer, recently released the MK5—a meaningful quality of life and user experience upgrade to the MK4 Coldcard. It builds on the strong security foundations set by its predecessor while adding some genuinely useful refinements. Today, I'll be reviewing the Orange and Glow in the Dark versions, examining their form factor and user experience upgrades to answer the question: are the upgrades worth the money?

Building on the well-known and trend-setting MK4 security platform—which brought two secure element chips from different manufacturers and an MCU to the same device—the MK5 focuses on quality of life improvements. These include better NFC connectivity, reworked buttons and plastic chassis, and a much larger screen, among other new features. This is the first hardware upgrade to the Coinkite MK line since the MK4 launched in 2022, integrating some of the technologies debuted by the Coldcard Q in 2023. (Left: MK5, center: MK4, right: MK3.)

What's new with the MK5 Coldcard? The big UX upgrades are immediately visible. The screen is much larger—roughly 30% bigger—featuring a "1.54-inch display protected by Gorilla Glass," which looks and feels considerably sturdier than older models.

The next obvious upgrade is the buttons. Unlike the MK4's indented buttons, which required your fingers to dive into little sockets to register a click, the MK5 buttons sit nearly flush with the chassis. The press feels satisfying—solid tactile feedback with a clean click. Much more comfortable than the warm, slightly uncomfortable, unresponsive feel of a touchscreen, as seen in other hardware wallets.

You also quickly notice the chassis has been redesigned. The screen section no longer pops out above the keyboard; instead, it's one unified rectangle with comfortable curved edges. It looks more modern, more elegant, while keeping that cypherpunk transparency that shows off the underlying hardware—a signature design principle of Coinkite products.

The MK5 also comes with a button and screen protector half case that slides and clicks in and out. It can be entirely removed and fits perfectly from the back of the device, exposing the USB power input at the bottom without issue.

Last but not least, Coinkite doubles down on NFC support with the MK5. An acronym for near field communication, the NFC antenna is an increasingly popular tech stack in the Bitcoin industry. From NFC tap-to-pay Lightning Bolt cards with cool designs and laser eyes, to Coinkite's own Tapsigners, to Cashu's tap-to-send features developed by Calle, NFC is proving its worth.

NFC is a powerful alternative to other wireless connection technologies like Bluetooth or Wi-Fi, which some hardware wallet providers have adopted—but come with some arguable downsides, mainly their range. Unlike those alternatives, NFC is short-range by design: we're talking centimeters, whereas Bluetooth and Wi-Fi operate in tens of meters. So the paranoid-level threat of someone with a long-range antenna catching a transaction in transit or connecting to your device remotely? Gone. There's also no multi-step device connection protocol with NFC—phones either have the feature on or off, the app starts scanning, and transmission occurs. No pin codes, no sifting through lists of Bluetooth-powered devices. Much simpler UX in theory.

It is also far superior in terms of user experience to the SD card transmission of pre-signed transactions back and forth from laptops or phones. While NFC may technically cross the "airgapped" line in the MK4 and MK5, it still has the best qualities of all wireless connectivity options and is set to off by default. Similar to the option to connect the MK5 to a computer via USB for data transmission, the NFC antenna can be toggled on when needed and off when not in use.