USBSparrow · BitcoinQ already set up and unlocked · USB enabled · data cable required
Trezor Safe 7:
✓
USB · BluetoothTrezor Suite · Bitcoin / Ethereum
iPhone
Coinkite COLDCARD Q:
✓
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 Q:
✓
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 Q:Bitcoin-only
Trezor Safe 7:Multiple cryptocurrencies
Controls / Display
Coinkite COLDCARD Q:Physical buttonsDisplay: Display without touch input
Trezor Safe 7:Touchscreen
Operating power
Coinkite COLDCARD Q:Batteries or USB power
Trezor Safe 7:Battery or USB power
Battery
Coinkite COLDCARD Q:Replaceable batteries
Trezor Safe 7:Rechargeable
What they have in common
Wallet recovery
Recovery phrase
Both
Before you choose
Consider
Coinkite COLDCARD QNeeds a compatible wallet app; follow the current COLDCARD advisory for firmware updates and migration of affected existing wallets.
Trezor Safe 7Wireless use means pairing the wallet with a compatible phone or computer and keeping its battery charged.
Set up Q’s wallet in Sparrow. Q scans the unsigned transaction QR, then Sparrow uses your computer’s camera to scan the signed result from Q.
SparrowUSBBitcoinWindows · macOS · LinuxQ already set up and unlocked · USB enabled · data cable requiredConnection requirements
Set up Q’s wallet in Sparrow and exchange unsigned and signed Bitcoin transaction files (PSBTs) over USB. Q must already be initialized and unlocked, with USB enabled and a data-capable USB-C cable.
iPhone · Android
NunchukNFCBitcoinSupport for wallet setup is unconfirmedConnection requirements
Use Nunchuk on a compatible NFC phone, with an already initialized Q powered on and NFC enabled, to exchange 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.
Coinkite COLDCARD Q:Sources disagreeCoinkite lists 3.2 inches on the Q product page and 2.3 inches in its Q documentation overview. The screen diagonal remains unresolved.
Trezor Safe 7:2.5″
Resolution
Coinkite COLDCARD Q:320 × 240 px
Trezor Safe 7:520 × 380 px
Colour mode
ColourBoth
Size and weight
Dimensions
Coinkite COLDCARD Q:120 × 75 × 22 mmDimensions as listed by the manufacturer
Trezor Safe 7:75.4 × 44.5 × 8.3 mmDimensions as listed by the manufacturer
