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Coinkite COLDCARD Mk5 or Ledger Flex?

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

Ledger Flex

One edition

Wallet 2

Add a wallet

Wallet 3

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In short

Recorded differences: Cryptocurrencies and Controls / Display.

Coinkite COLDCARD Mk5One edition

Price at Coinkite

Ledger FlexOne edition

Price at Ledger

Approve transactions

Computer: Coinkite COLDCARD Mk5:
microSDSparrow · Bitcoin
USBSparrow · BitcoinMk5 set up and unlocked · verified current firmware · USB data enabled · data cable; Ledger Flex:
USBLedger Wallet · Bitcoin / Ethereum
iPhone: Coinkite COLDCARD Mk5:
NFCNunchuk · Bitcoin
iPhone · Nunchuk · NFC · BitcoinSupport for wallet setup is unconfirmed; Ledger Flex:
BluetoothLedger Wallet · Bitcoin / Ethereum
Android: Coinkite COLDCARD Mk5:
NFCNunchuk · Bitcoin
Android · Nunchuk · NFC · BitcoinSupport for wallet setup is unconfirmed; Ledger Flex:
USB · BluetoothLedger Wallet · Bitcoin / Ethereum

Where they differ

Cryptocurrencies: Coinkite COLDCARD Mk5:Bitcoin-only; Ledger Flex:Multiple cryptocurrencies
Controls / Display: Coinkite COLDCARD Mk5:Physical buttonsDisplay: Display without touch input; Ledger Flex:Touchscreen
Battery: Coinkite COLDCARD Mk5:No battery; Ledger Flex:Rechargeable

What they have in common

Wallet recovery: Recovery phrase
Both

Not fully confirmed

Operating power: Coinkite COLDCARD Mk5:USB power; Ledger Flex: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.

Ledger FlexiPhone connects by Bluetooth. Android connects by USB or Bluetooth. NFC does not replace USB or Bluetooth for ordinary transactions. Cryptocurrency support depends on the app.

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).

Ledger Flex

Computer

Ledger WalletUSBBitcoin / EthereumWindows · macOS · Linux

iPhone

Ledger WalletBluetoothBitcoin / Ethereum

Android

Ledger WalletUSB · BluetoothBitcoin / Ethereum

Hardware detailsDifferent: 6 · Same: 1 · Not fully recorded: 11Show details (18)Hide details

Coinkite COLDCARD Mk5Ledger Flex

Display

Display type: Coinkite COLDCARD Mk5:LCD; Ledger Flex:E Ink
Screen diagonal: Coinkite COLDCARD Mk5:1.54″; Ledger Flex:2.8″
Colour mode: Coinkite COLDCARD Mk5:Monochrome; Ledger Flex:Grayscale
Resolution: Coinkite COLDCARD Mk5:Not recorded; Ledger Flex:480 × 600 px
Shades of grey: Coinkite COLDCARD Mk5:Not recorded; Ledger Flex:16

Power and charging

Battery life: Coinkite COLDCARD Mk5:No battery; Ledger Flex:Up to 10 hrUsage conditions not stated
Charging methods: Coinkite COLDCARD Mk5:No battery; Ledger Flex:USB-C
Wireless charging: Coinkite COLDCARD Mk5:No battery; Ledger Flex:Not supported

Device connections

USB port: USB-CBoth
Memory card slot: Coinkite COLDCARD Mk5:microSD; Ledger Flex:Not recorded
Bluetooth version: Coinkite COLDCARD Mk5:Not recorded; Ledger Flex:5.2
NFC functions: Coinkite COLDCARD Mk5:Not recorded; Ledger Flex:Ledger Recovery Key · Ledger Security Key

Memory

Storage space: Coinkite COLDCARD Mk5:Not recorded; Ledger Flex:1.5 MB

Size and weight

Dimensions: Coinkite COLDCARD Mk5:Not recorded; Ledger Flex:78.4 × 56.5 × 7.7 mmDimensions as listed by the manufacturer
Device weight: Coinkite COLDCARD Mk5:Not recorded; Ledger Flex:57.5 g

Security and software

Security chip: Coinkite COLDCARD Mk5:Not recorded; Ledger Flex:ST33K1M5 · CC EAL6+
Device software: Coinkite COLDCARD Mk5:Not recorded; Ledger Flex:Ledger OS