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- Compare
- Pro vs Shell
CoolWallet Pro vs Keycard Shell
What Pro does better (4) and where Shell wins (23) — every spec side by side.
Why is Pro better than Shell?
- Mobile appYes · Shell: No
- Thickness0.8 mm vs 19 mm23.8×
- BluetoothYes · Shell: No
- Warranty (months)12 vs 0
Why is Shell better than Pro?
- Open-source firmwareNo · Pro: Yes
- Reproducible buildsNo · Pro: Yes
- MultisigNo · Pro: Yes
- Air-gapped signingNo · Pro: Yes
- Anti-klepto (anti-exfil) signingNo · Pro: Yes
- BIP39 passphraseNo · Pro: Yes
- QR code cameraNo · Pro: Yes
- Compatible third-party wallets0 vs 7
- Screen size1.03″ vs 2″+94%
- Battery capacity15 mAh vs 800 mAh53.3×
- PIN entered on the deviceNo · Pro: Yes
- Duress PIN / decoy walletNo · Pro: Yes
Specifications
Side by side
| Security | ||
| Secure Element chip | Yes | Yes |
| Secure Element certification | EAL6+ | EAL6+ |
| Air-gapped signing | No | Yes |
| 100% air-gapped | No | No |
| Supply-chain & tamper protection | Yes | Yes |
| Secure boot | — | Yes |
| Anti-klepto (anti-exfil) signing | No | Yes |
| Firmware & open source | ||
| Open-source firmware | No | Yes |
| Source code available | Yes | Yes |
| Reproducible builds | No | Yes |
| Firmware licence | Limited Use | MIT |
| 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 | 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 | Yes | Yes |
| SeedQR backup | No | Yes |
| microSD backup | No | No |
| NFC backup card | No | Yes |
| User-added entropy (dice) | No | No |
| Stateless use (no stored keys) | No | Yes |
| Multiple seeds on one device | No | Yes |
| Bitcoin features | ||
| Multisig | No | Yes |
| Taproot | No | No |
| Miniscript | No | No |
| Message signing | No | No |
| Coin control | No | Yes |
| Own node connection | No | Yes |
| Tor support | No | Yes |
| Replace-by-fee | Yes | Yes |
| 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, Bluetooth, NFC | USB-C, NFC, QR code |
| USB | Yes | Yes |
| USB-C | No | Yes |
| Bluetooth | Yes | No |
| NFC | Yes | Yes |
| QR code camera | No | Yes |
| Animated QR (UR) | No | Yes |
| microSD signing | No | No |
| Screen & input | ||
| Screen | Yes | Yes |
| Screen size | 1.03″ | 2″ |
| Screen type | E-Ink | TFT IPS |
| Screen resolution | — | 240 × 320 |
| Touchscreen | No | No |
| Colour screen | No | Yes |
| Gorilla Glass | No | No |
| Controls | Buttons | Buttons |
| QWERTY keyboard | No | Yes |
| Battery & power | ||
| Built-in battery | Yes | Yes |
| Battery capacity | 15 mAh | 800 mAh |
| Removable battery | No | Yes |
| Wireless charging | No | No |
| Design | ||
| Weight | 6 g | — |
| Length | 85.6 mm | 105 mm |
| Width | 54 mm | 65 mm |
| Thickness | 0.8 mm | 19 mm |
| Materials | Plastic & Metal | ABS Plastic |
| Water / dust resistance | Yes | — |
| Several colours available | No | No |
| Warranty (months) | 12 | 0 |
| Assembled in | Taiwan | China |
| DIY build possible | No | Yes |
| Apps | ||
| Official apps | Android, iOS | — |
| Desktop app | No | 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 |
