Compare

Block Bitkey, BitBox02 Nova or Ledger Flex?

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

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In short

Transaction approval (Computer) is confirmed only for BitBox02 Nova and Ledger Flex.

Block BitkeyOne edition

Price at Block

BitBox02 NovaMulti-coin edition

Price at BitBox

Choose this edition at the store.

Ledger FlexOne edition

Price at Ledger

Bitkey

NovaMultiple cryptocurrencies

Approve transactions

Computer: Block Bitkey:
Support for signing is unconfirmed; BitBox02 Nova:
USBBitBoxApp · Bitcoin / Ethereum; Ledger Flex:
USBLedger Wallet · Bitcoin / Ethereum
iPhone: Block Bitkey:
NFCBitkey app · Bitcoin; BitBox02 Nova:
BluetoothBitBoxApp · Bitcoin / EthereumMust stay plugged in; Ledger Flex:
BluetoothLedger Wallet · Bitcoin / Ethereum
Android: Block Bitkey:
NFCBitkey app · Bitcoin; BitBox02 Nova:
USBBitBoxApp · Bitcoin / EthereumPhone needs USB OTG; Ledger Flex:
USB · BluetoothLedger Wallet · Bitcoin / Ethereum

Where they differ

Cryptocurrencies: Block Bitkey:Bitcoin-only; BitBox02 Nova:Multiple cryptocurrencies; Ledger Flex:Multiple cryptocurrencies
Controls / Display: Block Bitkey:Touchscreen; BitBox02 Nova:Touch sensorsDisplay: Display without touch input; Ledger Flex:Touchscreen
Wallet recovery: Block Bitkey:Phone, hardware and server keys with assisted recovery. Check service and country availability.; BitBox02 Nova:microSD backup and recovery phrase; Ledger Flex:Recovery phrase

Not fully confirmed

Operating power: Block Bitkey:Not recorded; BitBox02 Nova:USB power; Ledger Flex:Not recorded
Battery: Block Bitkey:Rechargeable; BitBox02 Nova:Not recorded; Ledger Flex:Rechargeable

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.

BitBox02 NovaOn iPhone and iPad, Bluetooth carries the data but the wallet still needs a physical power connection. You control it by touching its edges, not the screen. BitBoxApp on iPhone and iPad guides firmware updates when a compatible version is offered.

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

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.

BitBox02 Nova

Computer

BitBoxAppUSBBitcoin / EthereumWindows · macOS · Linux

Connection requirements

Ethereum requires the Multi edition. A Bitcoin-only hardware edition cannot be converted to Multi.

iPhone

BitBoxAppBluetoothBitcoin / EthereumMust stay plugged in

Connection requirements

With an iPhone, plug BitBox02 Nova into the phone or another suitable power source. It uses Bluetooth to exchange data. Ethereum needs the Multi edition; the Bitcoin-only edition cannot be changed to Multi.

Android

BitBoxAppUSBBitcoin / EthereumPhone needs USB OTG

Connection requirements

Your Android phone needs USB OTG support to connect to Nova over USB. Ethereum requires the Multi edition; a Bitcoin-only device cannot be changed to Multi.

Ledger Flex

Computer

Ledger WalletUSBBitcoin / EthereumWindows · macOS · Linux

iPhone

Ledger WalletBluetoothBitcoin / Ethereum

Android

Ledger WalletUSB · BluetoothBitcoin / Ethereum

Hardware detailsDifferent: 3 · Same: 1 · Not fully recorded: 18Show details (22)Hide details

Block BitkeyBitBox02 NovaLedger Flex

Display

Display type: Block Bitkey:OLED; BitBox02 Nova:OLED; Ledger Flex:E Ink
Resolution: Block Bitkey:Not recorded; BitBox02 Nova:128 × 64 px; Ledger Flex:480 × 600 px
Colour mode: Block Bitkey:Not recorded; BitBox02 Nova:Monochrome; Ledger Flex:Grayscale
Screen diagonal: Block Bitkey:Not recorded; BitBox02 Nova:Not recorded; Ledger Flex:2.8″
Shades of grey: Block Bitkey:Not recorded; BitBox02 Nova:Not recorded; Ledger Flex:16

Size and weight

Dimensions: Block Bitkey:66 × 60 × 13.6 mmDimensions as listed by the manufacturer; BitBox02 Nova:54.5 × 25.4 × 9.6 mmDimensions as listed by the manufacturer · Includes the connector; Ledger Flex:78.4 × 56.5 × 7.7 mmDimensions as listed by the manufacturer
Device weight: Block Bitkey:79 g; BitBox02 Nova:13 g; Ledger Flex:57.5 g

Power and charging

Charging methods: Block Bitkey:USB-C; BitBox02 Nova:Not recorded; Ledger Flex:USB-C
Battery life: Block Bitkey:Not recorded; BitBox02 Nova:Not recorded; Ledger Flex:Up to 10 hrUsage conditions not stated
Wireless charging: Block Bitkey:Not recorded; BitBox02 Nova:Not recorded; Ledger Flex:Not supported

Materials and finish

Materials: Block Bitkey:Corian Solid Surface; BitBox02 Nova:Not recorded; Ledger Flex:Not recorded

Device connections

USB port: USB-CAll three
Memory card slot: Block Bitkey:Not recorded; BitBox02 Nova:microSD; Ledger Flex:Not recorded
Bluetooth version: Block Bitkey:Not recorded; BitBox02 Nova:Not recorded; Ledger Flex:5.2
NFC functions: Block Bitkey:Not recorded; BitBox02 Nova:Not recorded; Ledger Flex:Ledger Recovery Key · Ledger Security Key

Security and software

Security chip: Block Bitkey:Not recorded; BitBox02 Nova:OPTIGA Trust M V3; Ledger Flex:ST33K1M5 · CC EAL6+
Device software: Block Bitkey:Not recorded; BitBox02 Nova:Not recorded; Ledger Flex:Ledger OS

Processor

Core and clock speed: Block Bitkey:Not recorded; BitBox02 Nova:Cortex-M4F · 120 MHz; Ledger Flex:Not recorded
Controllers: Block Bitkey:Not recorded; BitBox02 Nova:ATSAMD51J20A · DA14531; Ledger Flex:Not recorded

Key dates

Announced: Block Bitkey:Not recorded; BitBox02 Nova:June 20, 2025; Ledger Flex:Not recorded
Released: Block Bitkey:Not recorded; BitBox02 Nova:Not recorded; Ledger Flex:July 26, 2024