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Coinkite COLDCARD Mk5 or Block Bitkey?

The exact editions, side by side: how you’ll use them and the limits to know.

Block Bitkey

One edition

Wallet 2

Add a wallet

Wallet 3

Filters

Your device: Computer

Block Bitkey: This model does not match the current filters.

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In short

Transaction approval (Computer) is confirmed only for Coinkite COLDCARD Mk5.

Coinkite COLDCARD Mk5One edition

Price at Coinkite

Block BitkeyOne edition

Price at Block

Computer

Your device

Approve transactions: Coinkite COLDCARD Mk5:
microSDSparrow · Bitcoin
USBSparrow · BitcoinMk5 set up and unlocked · verified current firmware · USB data enabled · data cable; Block Bitkey:
Support for signing is unconfirmed
Set up the wallet: Coinkite COLDCARD Mk5:
microSDSparrow · Bitcoin
USBSparrow · BitcoinMk5 set up and unlocked · verified current firmware · USB data enabled · data cable; Block Bitkey:
Support for wallet setup is unconfirmed

Approve transactions

iPhone: Coinkite COLDCARD Mk5:
NFCNunchuk · Bitcoin
iPhone · Nunchuk · NFC · BitcoinSupport for wallet setup is unconfirmed; Block Bitkey:
NFCBitkey app · Bitcoin
Android: Coinkite COLDCARD Mk5:
NFCNunchuk · Bitcoin
Android · Nunchuk · NFC · BitcoinSupport for wallet setup is unconfirmed; Block Bitkey:
NFCBitkey app · Bitcoin

Where they differ

Controls / Display: Coinkite COLDCARD Mk5:Physical buttonsDisplay: Display without touch input; Block Bitkey:Touchscreen
Wallet recovery: Coinkite COLDCARD Mk5:Recovery phrase; Block Bitkey:Phone, hardware and server keys with assisted recovery. Check service and country availability.
Battery: Coinkite COLDCARD Mk5:No battery; Block Bitkey:Rechargeable

What they have in common

Cryptocurrencies: Bitcoin-only
Both

Not fully confirmed

Operating power: Coinkite COLDCARD Mk5:USB power; Block Bitkey:Not recorded

Before you choose

Consider

Coinkite COLDCARD Mk5Needs USB-C power during use. Check the current seed-generation advisory before reusing an older wallet; updating alone does not repair an affected seed.

Block BitkeyTwo of three keys are needed. Recovery involves your phone, cloud storage and the service, rather than a conventional recovery phrase.

Apps and requirements

Show detailsHide details

Connectivity

Coinkite COLDCARD Mk5

Computer

SparrowmicroSDBitcoinWindows · macOS · Linux

Connection requirements

Sparrow exchanges unsigned and signed Bitcoin transaction files (PSBTs) with Mk5 through microSD. Your computer needs a compatible card reader.

SparrowUSBBitcoinWindows · macOS · LinuxMk5 set up and unlocked · verified current firmware · USB data enabled · data cable

Connection requirements

Start with a Mk5 already initialized under its setup guide, running the verified current recommended standard firmware. Keep Mk5 unlocked, enable USB data and use a data-capable USB-C cable. Then add its wallet to Sparrow and sign Bitcoin transactions over USB.

iPhone · Android

NunchukNFCBitcoinSupport for wallet setup is unconfirmed

Connection requirements

Use Nunchuk on a compatible NFC phone with an already initialized Mk5, powered on and with NFC enabled. Import the wallet’s public account into Nunchuk before exchanging Bitcoin transaction files (PSBTs).

Block Bitkey

iPhone · Android

Bitkey appNFCBitcoin

Connection requirements

Needs an NFC phone and the Bitkey app. Setup requires a cloud backup and email alerts; recovery depends on the keys and backup access you retain.

Hardware detailsDifferent: 2 · Same: 1 · Not fully recorded: 6Show details (9)Hide details

Coinkite COLDCARD Mk5Block Bitkey

Display

Display type: Coinkite COLDCARD Mk5:LCD; Block Bitkey:OLED
Screen diagonal: Coinkite COLDCARD Mk5:1.54″; Block Bitkey:Not recorded
Colour mode: Coinkite COLDCARD Mk5:Monochrome; Block Bitkey:Not recorded

Power and charging

Charging methods: Coinkite COLDCARD Mk5:No battery; Block Bitkey:USB-C

Device connections

USB port: USB-CBoth
Memory card slot: Coinkite COLDCARD Mk5:microSD; Block Bitkey:Not recorded

Size and weight

Dimensions: Coinkite COLDCARD Mk5:Not recorded; Block Bitkey:66 × 60 × 13.6 mmDimensions as listed by the manufacturer
Device weight: Coinkite COLDCARD Mk5:Not recorded; Block Bitkey:79 g