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- BitBox02 Nova vs Flex
BitBox BitBox02 Nova vs Ledger Flex
What BitBox02 Nova does better (10) and where Flex wins (8) — every spec side by side.
vs
9.2Security8.1
9.3Open source5.5
9.6Bitcoin features8.8
4.7Ease of use8.7
7.2Connectivity9.0
Why is BitBox02 Nova better than Flex?
- Open-source firmwareYes · Flex: No
- Reproducible buildsYes · Flex: No
- Anti-klepto (anti-exfil) signingYes · Flex: No
- Source code availableYes · Flex: No
- Weight12 g vs 58 g4.8×
- Bitcoin-only firmware / editionYes · Flex: No
- BIP85 child seedsYes · Flex: No
- microSD backupYes · Flex: No
- User-added entropy (dice)Yes · Flex: No
- Silent PaymentsYes · Flex: No
Why is Flex better than BitBox02 Nova?
- Screen size1.38″ vs 2.84″2.1×
- TouchscreenNo · BitBox02 Nova: Yes
- Duress PIN / decoy walletNo · BitBox02 Nova: Yes
- NFC backup cardNo · BitBox02 Nova: Yes
- NFCNo · BitBox02 Nova: Yes
- Built-in batteryNo · BitBox02 Nova: Yes
- Compatible third-party wallets10 vs 11+10%
- Thickness9.6 mm vs 7.7 mm+25%
Specifications
Side by side
| Security | ||
| Secure Element chip | Yes | Yes |
| Secure Element certification | EAL6+ | EAL6+ |
| Air-gapped signing | No | No |
| 100% air-gapped | No | No |
| Supply-chain & tamper protection | Yes | Yes |
| Secure boot | Yes | — |
| Anti-klepto (anti-exfil) signing | Yes | No |
| Firmware & open source | ||
| Open-source firmware | Yes | No |
| Source code available | Yes | No |
| Reproducible builds | Yes | No |
| Firmware licence | Apache 2.0 | Limited Use |
| Upgradable firmware | Yes | Yes |
| Firmware update via | USB, Bluetooth | Bluetooth |
| Bitcoin-only firmware / edition | Yes | No |
| Device lock | ||
| PIN lock | Yes | Yes |
| PIN entered on the device | Yes | Yes |
| Fingerprint unlock | No | No |
| Duress PIN / decoy wallet | No | Yes |
| Brick / wipe PIN | No | No |
| Wipe after failed attempts | Yes | Yes |
| Time-delayed unlock | No | No |
| Anti-phishing words | No | No |
| Keys & backup | ||
| BIP39 passphrase | Yes | Yes |
| Shamir backup (SLIP-39) | No | No |
| Seed XOR | No | No |
| BIP85 child seeds | Yes | No |
| 24-word seed | Yes | Yes |
| SeedQR backup | No | No |
| microSD backup | Yes | No |
| NFC backup card | No | Yes |
| User-added entropy (dice) | Yes | No |
| Stateless use (no stored keys) | Yes | No |
| Multiple seeds on one device | No | No |
| Bitcoin features | ||
| Multisig | Yes | Yes |
| Taproot | Yes | Yes |
| Miniscript | Yes | Yes |
| Message signing | Yes | Yes |
| Coin control | Yes | Yes |
| Own node connection | Yes | Yes |
| Tor support | Yes | Yes |
| Replace-by-fee | Yes | Yes |
| Silent Payments | Yes | No |
| Spending limits | No | No |
| Testnet | Yes | Yes |
| Supported assets | ||
| Altcoins & tokens | Yes | Yes |
| Bitcoin only | No | No |
| Connectivity | ||
| Signing connectivity | USB-C, Bluetooth | USB-C, Bluetooth, NFC |
| USB | Yes | Yes |
| USB-C | Yes | Yes |
| Bluetooth | Yes | Yes |
| NFC | No | Yes |
| QR code camera | No | No |
| Animated QR (UR) | No | No |
| microSD signing | No | No |
| Screen & input | ||
| Screen | Yes | Yes |
| Screen size | 1.38″ | 2.84″ |
| Screen type | OLED | E-Ink |
| Screen resolution | 128 × 64 | 600 × 480 |
| Touchscreen | No | Yes |
| Colour screen | No | No |
| Gorilla Glass | No | Yes |
| Controls | Buttons | Touch Screen |
| QWERTY keyboard | No | — |
| Battery & power | ||
| Built-in battery | No | Yes |
| Battery capacity | — | 200 mAh |
| Removable battery | — | No |
| Wireless charging | No | No |
| Design | ||
| Weight | 12 g | 58 g |
| Length | 54.5 mm | 78.4 mm |
| Width | 25.4 mm | 56.5 mm |
| Thickness | 9.6 mm | 7.7 mm |
| Materials | Polycarbonate | Plastic & Aluminum |
| Water / dust resistance | No | No |
| Several colours available | Yes | Yes |
| Warranty (months) | 24 | 24 |
| Assembled in | Switzerland | Vietnam |
| DIY build possible | No | No |
| Apps | ||
| Official apps | Windows, macOS, Linux, Android, iOS | Windows, macOS, Linux, Android, iOS |
| Desktop app | Yes | Yes |
| Mobile app | Yes | Yes |
| Works with wallet apps | Bitcoin Safe, Wasabi, Nunchuk, Electrum, Sparrow, Specter Desktop, Blockstream Green, BlueWallet, Bitcoin Keeper, Liana | Bitcoin Safe, Theya, Wasabi, Nunchuk, Electrum, Sparrow, Specter Desktop, Blockstream Green, BlueWallet, Bitcoin Keeper, Liana |
| Compatible third-party wallets | 10 | 11 |
| Other features | ||
| FIDO2 / U2F security key | Yes | Yes |
| Password manager | No | Yes |
