- isse.eu.com
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- DIY vs S1
Krux DIY vs SafePal S1
What DIY does better (23) and where S1 wins (5) — every spec side by side.
Why is DIY better than S1?
- Open-source firmwareYes · S1: No
- Reproducible buildsYes · S1: No
- MultisigYes · S1: No
- Screen size3.5″ vs 1.3″2.7×
- 100% air-gappedYes · S1: No
- Source code availableYes · S1: No
- MiniscriptYes · S1: No
- TouchscreenYes · S1: No
- Compatible third-party wallets12 vs 0
- Bitcoin-only firmware / editionYes · S1: No
- Anti-phishing wordsYes · S1: No
- Seed XORYes · S1: No
Why is S1 better than DIY?
- Secure Element chipNo · DIY: Yes
- Mobile appNo · DIY: Yes
- Thickness16.5 mm vs 6 mm2.8×
- Secure bootNo · DIY: Yes
- Weight150 g vs 126 g+19%
Specifications
Side by side
| Security | ||
| Secure Element chip | No | Yes |
| Secure Element certification | — | EAL5+ |
| Air-gapped signing | Yes | Yes |
| 100% air-gapped | Yes | No |
| Supply-chain & tamper protection | Yes | Yes |
| Secure boot | No | Yes |
| Anti-klepto (anti-exfil) signing | No | No |
| Firmware & open source | ||
| Open-source firmware | Yes | No |
| Source code available | Yes | No |
| Reproducible builds | Yes | No |
| Firmware licence | MIT | — |
| Upgradable firmware | Yes | Yes |
| Firmware update via | USB, microSD | USB |
| 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 | No |
| Brick / wipe PIN | No | No |
| Wipe after failed attempts | No | No |
| Time-delayed unlock | No | No |
| Anti-phishing words | Yes | No |
| Keys & backup | ||
| BIP39 passphrase | Yes | Yes |
| Shamir backup (SLIP-39) | No | No |
| Seed XOR | Yes | No |
| BIP85 child seeds | Yes | No |
| 24-word seed | Yes | Yes |
| SeedQR backup | Yes | No |
| microSD backup | Yes | No |
| NFC backup card | No | No |
| User-added entropy (dice) | Yes | No |
| Stateless use (no stored keys) | Yes | No |
| Multiple seeds on one device | No | No |
| Bitcoin features | ||
| Multisig | Yes | No |
| Taproot | Yes | Yes |
| Miniscript | Yes | No |
| Message signing | Yes | No |
| Coin control | Yes | Yes |
| Own node connection | Yes | No |
| Tor support | Yes | No |
| Replace-by-fee | Yes | No |
| Silent Payments | No | No |
| Spending limits | No | No |
| Testnet | Yes | No |
| Supported assets | ||
| Altcoins & tokens | No | Yes |
| Bitcoin only | Yes | No |
| Connectivity | ||
| Signing connectivity | QR code, microSD | QR code |
| USB | No | No |
| USB-C | Yes | Yes |
| Bluetooth | No | No |
| NFC | No | No |
| QR code camera | Yes | Yes |
| Animated QR (UR) | Yes | No |
| microSD signing | Yes | No |
| Screen & input | ||
| Screen | Yes | Yes |
| Screen size | 3.5″ | 1.3″ |
| Screen type | TFT | IPS |
| Screen resolution | 320 × 480 | 320 × 320 |
| Touchscreen | Yes | No |
| Colour screen | Yes | Yes |
| Gorilla Glass | No | No |
| Controls | Touch Screen | Buttons |
| QWERTY keyboard | No | No |
| Battery & power | ||
| Built-in battery | Yes | Yes |
| Battery capacity | 520 mAh | 400 mAh |
| Removable battery | No | No |
| Wireless charging | No | No |
| Design | ||
| Weight | 150 g | 126 g |
| Length | 104.3 mm | 86 mm |
| Width | 63.3 mm | 54 mm |
| Thickness | 16.5 mm | 6 mm |
| Materials | Plastic | Plastic |
| Water / dust resistance | No | No |
| Several colours available | No | No |
| Warranty (months) | — | 12 |
| Assembled in | — | China |
| DIY build possible | Yes | No |
| Apps | ||
| Official apps | — | Android, iOS, Browser extension |
| Desktop app | No | No |
| Mobile app | No | Yes |
| Works with wallet apps | Bitcoin Safe, Zeus, Nunchuk, Cove, Electrum, Sparrow, Specter Desktop, Blockstream Green, BlueWallet, Bitcoin Keeper, Bull, Liana | — |
| Compatible third-party wallets | 12 | 0 |
| Other features | ||
| FIDO2 / U2F security key | No | No |
| Password manager | No | No |
