USBSparrow · BitcoinMk5 set up and unlocked · verified current firmware · USB data enabled · data cable
Trezor Safe 7:
✓
USB · BluetoothTrezor Suite · Bitcoin / Ethereum
iPhone
Coinkite COLDCARD Mk5:
✓
NFCNunchuk · Bitcoin
iPhone · Nunchuk · NFC · BitcoinSupport for wallet setup is unconfirmed
Trezor Safe 7:
✓
BluetoothTrezor Suite · Bitcoin / EthereumCurrent app needs iOS 16.4+
Android
Coinkite COLDCARD Mk5:
✓
NFCNunchuk · Bitcoin
Android · Nunchuk · NFC · BitcoinSupport for wallet setup is unconfirmed
Trezor Safe 7:
✓
USB · BluetoothTrezor Suite · Bitcoin / EthereumAndroid 12+
Where they differ
Cryptocurrencies
Coinkite COLDCARD Mk5:Bitcoin-only
Trezor Safe 7:Multiple cryptocurrencies
Controls / Display
Coinkite COLDCARD Mk5:Physical buttonsDisplay: Display without touch input
Trezor Safe 7:Touchscreen
Operating power
Coinkite COLDCARD Mk5:USB power
Trezor Safe 7:Battery or USB power
Battery
Coinkite COLDCARD Mk5:No battery
Trezor Safe 7:Rechargeable
What they have in common
Wallet recovery
Recovery phrase
Both
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.
Trezor Safe 7Wireless use means pairing the wallet with a compatible phone or computer and keeping its battery charged.
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 cableConnection 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 unconfirmedConnection 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).
Trezor Safe 7
Computer
Trezor SuiteUSB · BluetoothBitcoin / EthereumWindows · macOS · Linux
Setup and signing use the Trezor Suite app over Bluetooth. Installing the current iPhone app requires iOS 16.4 or later. USB-C is for charging. Check that Suite supports the asset and network you want to use; the Bitcoin-only edition is limited to Bitcoin.
Setup and signing use the Trezor Suite app on Android 12 or later, over Bluetooth or a supported USB-C connection. Check that Suite supports the asset and network you want to use; the Bitcoin-only edition is limited to Bitcoin.
