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- Device vs Shell
Frostsnap Device vs Keycard Shell
What Device does better (8) and where Shell wins (19) — every spec side by side.
Why is Device better than Shell?
- TaprootYes · Shell: No
- TouchscreenYes · Shell: No
- Mobile appYes · Shell: No
- Thickness9 mm vs 19 mm2.1×
- Bitcoin-only firmware / editionYes · Shell: No
- User-added entropy (dice)Yes · Shell: No
- Message signingYes · Shell: No
- Desktop appYes · Shell: No
Why is Shell better than Device?
- Secure Element chipNo · Device: Yes
- MultisigNo · Device: Yes
- Air-gapped signingNo · Device: Yes
- BIP39 passphraseNo · Device: Yes
- QR code cameraNo · Device: Yes
- Compatible third-party wallets0 vs 7
- PIN entered on the deviceNo · Device: Yes
- Duress PIN / decoy walletNo · Device: Yes
- Wipe after failed attemptsNo · Device: Yes
- Shamir backup (SLIP-39)No · Device: Yes
- 24-word seedNo · Device: Yes
- SeedQR backupNo · Device: Yes
Specifications
Side by side
| Security | ||
| Secure Element chip | No | Yes |
| Secure Element certification | — | EAL6+ |
| Air-gapped signing | No | Yes |
| 100% air-gapped | No | No |
| Supply-chain & tamper protection | — | Yes |
| Secure boot | Yes | Yes |
| Anti-klepto (anti-exfil) signing | Yes | Yes |
| Firmware & open source | ||
| Open-source firmware | Yes | Yes |
| Source code available | Yes | Yes |
| Reproducible builds | Yes | Yes |
| Firmware licence | MIT | MIT |
| Upgradable firmware | Yes | Yes |
| Firmware update via | USB | USB |
| Bitcoin-only firmware / edition | Yes | No |
| Device lock | ||
| PIN lock | Yes | Yes |
| PIN entered on the device | No | Yes |
| Fingerprint unlock | — | No |
| Duress PIN / decoy wallet | No | Yes |
| Brick / wipe PIN | No | No |
| 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 | Yes |
| Seed XOR | No | No |
| BIP85 child seeds | No | No |
| 24-word seed | No | Yes |
| SeedQR backup | No | Yes |
| microSD backup | No | No |
| NFC backup card | No | Yes |
| User-added entropy (dice) | Yes | No |
| Stateless use (no stored keys) | No | Yes |
| Multiple seeds on one device | No | Yes |
| Bitcoin features | ||
| Multisig | No | Yes |
| Taproot | Yes | No |
| Miniscript | No | No |
| Message signing | Yes | No |
| Coin control | No | Yes |
| Own node connection | Yes | Yes |
| Tor support | Yes | Yes |
| Replace-by-fee | Yes | Yes |
| Silent Payments | No | No |
| FROST threshold signing | Yes | — |
| Spending limits | No | No |
| Testnet | Yes | Yes |
| Supported assets | ||
| Altcoins & tokens | No | Yes |
| Bitcoin only | Yes | No |
| Connectivity | ||
| Signing connectivity | USB-C | USB-C, NFC, QR code |
| USB | Yes | Yes |
| USB-C | Yes | Yes |
| Bluetooth | No | No |
| NFC | No | Yes |
| QR code camera | No | Yes |
| Animated QR (UR) | No | Yes |
| microSD signing | No | No |
| Screen & input | ||
| Screen | Yes | Yes |
| Screen size | 1.69″ | 2″ |
| Screen type | OLED | TFT IPS |
| Screen resolution | 240 × 280 | 240 × 320 |
| Touchscreen | Yes | No |
| Colour screen | Yes | Yes |
| Gorilla Glass | No | No |
| Controls | Touch Screen | Buttons |
| QWERTY keyboard | No | Yes |
| Battery & power | ||
| Built-in battery | No | Yes |
| Battery capacity | — | 800 mAh |
| Removable battery | — | Yes |
| Wireless charging | No | No |
| Design | ||
| Weight | 60 g | — |
| Length | 42 mm | 105 mm |
| Width | 34 mm | 65 mm |
| Thickness | 9 mm | 19 mm |
| Materials | Aluminum | ABS Plastic |
| Water / dust resistance | No | — |
| Several colours available | Yes | No |
| Warranty (months) | — | 0 |
| Assembled in | Malaysia | China |
| DIY build possible | No | Yes |
| Apps | ||
| Official apps | Windows, macOS, Linux, Android | — |
| Desktop app | Yes | No |
| Mobile app | Yes | No |
| Works with wallet apps | — | Bitcoin Safe, Nunchuk, Cove, Sparrow, Specter Desktop, BlueWallet, Bull |
| Compatible third-party wallets | 0 | 7 |
| Other features | ||
| FIDO2 / U2F security key | No | No |
| Password manager | No | No |
