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Block Bitkey or Coinkite COLDCARD Mk5?

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

Coinkite COLDCARD Mk5

One edition

Wallet 2

Add a wallet

Wallet 3

Filters

Connection for signing: USB

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

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In short

For your selected criteria, transaction approval (Computer) is confirmed only for Coinkite COLDCARD Mk5.

Block BitkeyOne edition

Price at Block

Coinkite COLDCARD Mk5One edition

Price at Coinkite

Approve transactions

Computer: Block Bitkey:
Transaction approval not confirmed for your selected criteria; Coinkite COLDCARD Mk5:
USBSparrow · BitcoinMk5 set up and unlocked · verified current firmware · USB data enabled · data cable
iPhone: Block Bitkey:
Transaction approval not confirmed for your selected criteria; Coinkite COLDCARD Mk5:
Transaction approval not confirmed for your selected criteria
iPhone · Nunchuk · NFC · BitcoinSupport for wallet setup is unconfirmed
Android: Block Bitkey:
Transaction approval not confirmed for your selected criteria; Coinkite COLDCARD Mk5:
Transaction approval not confirmed for your selected criteria
Android · Nunchuk · NFC · BitcoinSupport for wallet setup is unconfirmed

Where they differ

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

What they have in common

Cryptocurrencies: Bitcoin-only
Both

Not fully confirmed

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

Before you choose

Consider

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

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.

Apps and requirements

Show detailsHide details

Connectivity

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.

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).

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

Block BitkeyCoinkite COLDCARD Mk5

Display

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

Size and weight

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