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Coinkite COLDCARD Q 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

Filters

Your device: Android

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In short

Recorded differences: Cryptocurrencies and Controls / Display.

Coinkite COLDCARD QOne edition

Price at Coinkite

Ledger FlexOne edition

Price at Ledger

Android

Your device

Approve transactions: Coinkite COLDCARD Q:
NFCNunchuk · Bitcoin
Android · Nunchuk · NFC · BitcoinSupport for wallet setup is unconfirmed; Ledger Flex:
USB · BluetoothLedger Wallet · Bitcoin / Ethereum
Set up the wallet: Coinkite COLDCARD Q:
Support for wallet setup is unconfirmed; Ledger Flex:
USB · BluetoothLedger Wallet · Bitcoin / Ethereum

Approve transactions

Computer: Coinkite COLDCARD Q:
microSDSparrow · Bitcoin
QRSparrow · Bitcoin
USBSparrow · BitcoinQ already set up and unlocked · USB enabled · data cable required; Ledger Flex:
USBLedger Wallet · Bitcoin / Ethereum
iPhone: Coinkite COLDCARD Q:
NFCNunchuk · Bitcoin
iPhone · Nunchuk · NFC · BitcoinSupport for wallet setup is unconfirmed; Ledger Flex:
BluetoothLedger Wallet · Bitcoin / Ethereum

Where they differ

Cryptocurrencies: Coinkite COLDCARD Q:Bitcoin-only; Ledger Flex:Multiple cryptocurrencies
Controls / Display: Coinkite COLDCARD Q:Physical buttonsDisplay: Display without touch input; Ledger Flex:Touchscreen
Battery: Coinkite COLDCARD Q:Replaceable batteries; Ledger Flex:Rechargeable

What they have in common

Wallet recovery: Recovery phrase
Both

Not fully confirmed

Operating power: Coinkite COLDCARD Q:Batteries or USB power; Ledger Flex:Not recorded

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.

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 Q

Android · iPhone

NunchukNFCBitcoinSupport for wallet setup is unconfirmed

Connection requirements

Use Nunchuk on a compatible NFC phone, with an already initialized Q powered on and NFC enabled, to exchange Bitcoin transaction files (PSBTs).

Computer

SparrowmicroSDBitcoinWindows · macOS · Linux

Connection requirements

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

SparrowQRBitcoinWindows · macOS · Linux

Connection requirements

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 required

Connection 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.

Ledger Flex

Android

Ledger WalletUSB · BluetoothBitcoin / Ethereum

Computer

Ledger WalletUSBBitcoin / EthereumWindows · macOS · Linux

iPhone

Ledger WalletBluetoothBitcoin / Ethereum

Hardware detailsDifferent: 5 · Same: 1 · Not fully recorded: 14Show details (20)Hide details

Coinkite COLDCARD QLedger Flex

Display

Display type: Coinkite COLDCARD Q:LCD; Ledger Flex:E Ink
Screen diagonal: 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.; Ledger Flex:2.8″
Resolution: Coinkite COLDCARD Q:320 × 240 px; Ledger Flex:480 × 600 px
Colour mode: Coinkite COLDCARD Q:Colour; Ledger Flex:Grayscale
Shades of grey: Coinkite COLDCARD Q:Not recorded; Ledger Flex:16

Size and weight

Dimensions: Coinkite COLDCARD Q:120 × 75 × 22 mmDimensions as listed by the manufacturer; Ledger Flex:78.4 × 56.5 × 7.7 mmDimensions as listed by the manufacturer
Weight without batteries: Coinkite COLDCARD Q:93 g; Ledger Flex:Not recorded
Device weight: Coinkite COLDCARD Q:Not recorded; Ledger Flex:57.5 g

Power and charging

Replaceable cells: Coinkite COLDCARD Q:3 × AAA; Ledger Flex:Not recorded
Battery life: Coinkite COLDCARD Q:Not recorded; Ledger Flex:Up to 10 hrUsage conditions not stated
Charging methods: Coinkite COLDCARD Q:Not recorded; Ledger Flex:USB-C
Wireless charging: Coinkite COLDCARD Q:Not recorded; Ledger Flex:Not supported

Device connections

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

Security and software

Security chip: Coinkite COLDCARD Q:Microchip ATECC608; Maxim DS28C36B; Ledger Flex:ST33K1M5 · CC EAL6+
Device software: Coinkite COLDCARD Q:Not recorded; Ledger Flex:Ledger OS