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- One vs Optimum
BC Vault One vs Prokey Optimum
What One does better (8) and where Optimum wins (9) — every spec side by side.
Why is One better than Optimum?
- Screen size2.42″ vs 0.96″2.5×
- Duress PIN / decoy walletYes · Optimum: No
- microSD backupYes · Optimum: No
- User-added entropy (dice)Yes · Optimum: No
- Replace-by-feeYes · Optimum: No
- USB-CYes · Optimum: No
- Warranty (months)24 vs 122×
- Desktop appYes · Optimum: No
Why is Optimum better than One?
- Secure Element chipNo · One: Yes
- Open-source firmwareNo · One: Yes
- Source code availableNo · One: Yes
- BIP39 passphraseNo · One: Yes
- Weight41 g vs 17 g2.5×
- Brick / wipe PINNo · One: Yes
- Wipe after failed attemptsNo · One: Yes
- 24-word seedNo · One: Yes
- Thickness10 mm vs 9.4 mm+6%
Specifications
Side by side
| Security | ||
| Secure Element chip | No | Yes |
| Air-gapped signing | No | No |
| 100% air-gapped | No | No |
| Supply-chain & tamper protection | Yes | Yes |
| Anti-klepto (anti-exfil) signing | No | No |
| Firmware & open source | ||
| Open-source firmware | No | Yes |
| Source code available | No | Yes |
| Reproducible builds | No | No |
| Firmware licence | — | Lesser GPLv3 |
| Upgradable firmware | Yes | Yes |
| Firmware update via | USB | USB |
| Bitcoin-only firmware / edition | No | No |
| Device lock | ||
| PIN lock | Yes | Yes |
| PIN entered on the device | Yes | Yes |
| Fingerprint unlock | No | No |
| Duress PIN / decoy wallet | Yes | No |
| Brick / wipe PIN | No | Yes |
| Wipe after failed attempts | No | Yes |
| Time-delayed unlock | No | No |
| Anti-phishing words | No | No |
| Keys & backup | ||
| BIP39 passphrase | No | Yes |
| Shamir backup (SLIP-39) | No | No |
| Seed XOR | No | No |
| BIP85 child seeds | No | No |
| 24-word seed | No | Yes |
| SeedQR backup | No | No |
| microSD backup | Yes | No |
| NFC backup card | No | No |
| User-added entropy (dice) | Yes | No |
| Stateless use (no stored keys) | No | No |
| Multiple seeds on one device | Yes | No |
| Bitcoin features | ||
| Multisig | No | No |
| Taproot | No | — |
| Miniscript | No | No |
| Message signing | No | No |
| Coin control | No | No |
| Own node connection | No | No |
| Tor support | No | No |
| Replace-by-fee | Yes | No |
| Silent Payments | No | No |
| Spending limits | No | No |
| Testnet | No | Yes |
| Supported assets | ||
| Altcoins & tokens | Yes | Yes |
| Bitcoin only | No | No |
| Connectivity | ||
| Signing connectivity | USB-C | USB |
| USB | Yes | Yes |
| USB-C | Yes | No |
| Bluetooth | No | No |
| NFC | No | No |
| QR code camera | No | No |
| Animated QR (UR) | No | No |
| microSD signing | No | No |
| Screen & input | ||
| Screen | Yes | Yes |
| Screen size | 2.42″ | 0.96″ |
| Screen type | OLED | LCD |
| Screen resolution | 128 × 64 | 128 × 64 |
| Touchscreen | No | No |
| Colour screen | No | No |
| Gorilla Glass | No | No |
| Controls | Buttons | Buttons |
| QWERTY keyboard | No | No |
| Battery & power | ||
| Built-in battery | No | No |
| Wireless charging | No | No |
| Design | ||
| Weight | 41 g | 17 g |
| Length | 100 mm | 50 mm |
| Width | 57 mm | 41 mm |
| Thickness | 10 mm | 9.4 mm |
| Materials | Plastic/Aluminium | Plastic |
| Water / dust resistance | No | No |
| Several colours available | Yes | No |
| Warranty (months) | 24 | 12 |
| Assembled in | Slovenia | — |
| DIY build possible | No | No |
| Apps | ||
| Official apps | Windows, macOS, Linux | — |
| Desktop app | Yes | No |
| Mobile app | No | No |
| Compatible third-party wallets | 0 | 0 |
| Other features | ||
| FIDO2 / U2F security key | Yes | Yes |
| Password manager | No | No |
