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- Blue vs Flex
Ledger Blue vs Ledger Flex
What Blue does better (0) and where Flex wins (2) — every spec side by side.
Why is Blue better than Flex?
Blue has no measurable advantages in this pair.
Why is Flex better than Blue?
- Weight90 g vs 58 g+57%
- Thickness10 mm vs 7.7 mm+30%
Specifications
Side by side
| Security | ||
| Secure Element chip | — | Yes |
| Secure Element certification | — | EAL6+ |
| Air-gapped signing | — | No |
| 100% air-gapped | — | No |
| Supply-chain & tamper protection | — | Yes |
| Anti-klepto (anti-exfil) signing | — | No |
| Firmware & open source | ||
| Open-source firmware | No | No |
| Source code available | No | No |
| Reproducible builds | — | No |
| Firmware licence | — | Limited Use |
| Upgradable firmware | — | Yes |
| Firmware update via | — | Bluetooth |
| Bitcoin-only firmware / edition | — | No |
| Device lock | ||
| PIN lock | — | Yes |
| PIN entered on the device | — | Yes |
| Fingerprint unlock | — | No |
| Duress PIN / decoy wallet | — | Yes |
| Brick / wipe PIN | — | No |
| Wipe after failed attempts | — | Yes |
| Time-delayed unlock | — | No |
| Anti-phishing words | — | No |
| Keys & backup | ||
| BIP39 passphrase | — | Yes |
| Shamir backup (SLIP-39) | — | No |
| Seed XOR | — | No |
| BIP85 child seeds | — | No |
| 24-word seed | — | Yes |
| SeedQR backup | — | No |
| microSD backup | — | No |
| NFC backup card | — | Yes |
| User-added entropy (dice) | — | No |
| Stateless use (no stored keys) | — | No |
| Multiple seeds on one device | — | No |
| Bitcoin features | ||
| Multisig | — | Yes |
| Taproot | — | Yes |
| Miniscript | — | Yes |
| Message signing | — | Yes |
| Coin control | — | Yes |
| Own node connection | — | Yes |
| Tor support | — | Yes |
| Replace-by-fee | — | Yes |
| Silent Payments | — | No |
| Spending limits | — | No |
| Testnet | — | Yes |
| Supported assets | ||
| Altcoins & tokens | — | Yes |
| Bitcoin only | — | No |
| Connectivity | ||
| Signing connectivity | — | USB-C, Bluetooth, NFC |
| USB | — | Yes |
| USB-C | — | Yes |
| Bluetooth | — | Yes |
| NFC | — | Yes |
| QR code camera | — | No |
| Animated QR (UR) | — | No |
| microSD signing | — | No |
| Screen & input | ||
| Screen | — | Yes |
| Screen size | — | 2.84″ |
| Screen type | — | E-Ink |
| Screen resolution | — | 600 × 480 |
| Touchscreen | — | Yes |
| Colour screen | — | No |
| Gorilla Glass | — | Yes |
| Controls | — | Touch Screen |
| Battery & power | ||
| Built-in battery | — | Yes |
| Battery capacity | — | 200 mAh |
| Removable battery | — | No |
| Wireless charging | — | No |
| Design | ||
| Weight | 90 g | 58 g |
| Length | 97 mm | 78.4 mm |
| Width | 68 mm | 56.5 mm |
| Thickness | 10 mm | 7.7 mm |
| Materials | — | Plastic & Aluminum |
| Water / dust resistance | — | No |
| Several colours available | — | Yes |
| Warranty (months) | — | 24 |
| Assembled in | — | Vietnam |
| DIY build possible | — | No |
| Apps | ||
| Official apps | — | Windows, macOS, Linux, Android, iOS |
| Desktop app | — | Yes |
| Mobile app | — | Yes |
| Works with wallet apps | — | Bitcoin Safe, Theya, Wasabi, Nunchuk, Electrum, Sparrow, Specter Desktop, Blockstream Green, BlueWallet, Bitcoin Keeper, Liana |
| Compatible third-party wallets | — | 11 |
| Other features | ||
| FIDO2 / U2F security key | — | Yes |
| Password manager | — | Yes |
