OneKey Classic 1S Bitcoin Edition Review
OneKey's Bitcoin-only build of the Classic 1S
Disclosure: I work at Blockstream, the company that makes the Jade wallets. I joined the company after many years as a satisfied user.
OneKey makes multi-coin wallets, so I didn't expect to review one with a Bitcoin-only badge. The Classic 1S Pure Bitcoin Edition ships with Bitcoin-only firmware, costs $79, and has no battery, so it runs off USB-C power. The firmware is open source under GPL-3.0, and OneKey publishes each Bitcoin build as its own GitHub release. You confirm transactions with buttons on a 1.54-inch monochrome screen. There is no camera and no QR signing, so it is not air-gapped.
The Bitcoin Edition supports only the Bitcoin network: no Ethereum, no Solana, no tokens. That is the right call. The catch is that it is a firmware choice, not a hardware one. OneKey's app can switch the same device to its multi-coin firmware, and the company's main business is still selling multi-coin wallets.
About OneKey
Security Architecture
EAL 6+ secure element with open-source, reproducible firmware. Signs over USB-C with confirmation on the device. Not air-gapped.
| Secure Element | EAL 6+ certified (chip model not published) |
| Connection Methods | USB-C |
| Display | 1.54" monochrome OLED, button input |
| Passphrase Support | Yes |
| Multisig Support | Yes |
Trust Assessment
Reasons to Trust
- Open-source, reproducible firmware (GPL-3.0)
- Bitcoin-only firmware out of the box
- SlowMist audit of the Classic 1S firmware
- Public bug bounty that covers Classic 1S firmware
Concerns
- Company sells multi-coin wallets
- Firmware can be switched to multi-coin
- Hong Kong company
- Bitcoin-only firmware only since January 2026
- OneKey Mini had serious seed-extraction findings
Where It Shines
- Bitcoin-Only Firmware: It ships supporting only the Bitcoin network, so no altcoin code runs on the device.
- Open Source and Reproducible: The firmware is GPL-3.0 on GitHub, and each Bitcoin build is tagged as its own release.
- Cheap: $79 buys a Bitcoin-only device with a secure element and passphrase support.
- Works With Sparrow: Sparrow supports the Classic 1S, and OneKey lists Sparrow as compatible.
Where It Falls Short
- Not Air-Gapped: Every signature goes over USB-C. QR signing is only on OneKey's Pro models.
- Multi-Coin Company: OneKey's business is multi-coin wallets, and this device can be switched back to multi-coin firmware.
- Short Bitcoin-Only Record: OneKey shipped its first Bitcoin-only firmware for the Classic 1S in January 2026.
- Bluetooth Unclear: OneKey lists Bluetooth for the Classic 1S family but does not say whether the battery-free Pure keeps it.
Best For
- Bitcoiners who want a cheap Bitcoin-only USB signer
- Sparrow users who want a secure element
- OneKey users moving to Bitcoin-only firmware
Frequently Asked Questions
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Specs Overview
$79
7.4/10
Bitcoin-Only
Open Source, Secure Element, Budget
1.54" monochrome OLED, button input
USB-C
Bottom Line
This is the best thing OneKey sells, and it is a fair $79 Bitcoin-only wallet. You get open-source firmware with reproducible builds, a secure element, passphrase support, and Sparrow compatibility. You don't get air-gapped signing, and you are trusting a Hong Kong company whose other products chase every token. At the same $79 list price, the Blockstream Jade adds a camera and QR signing from a company that only builds for Bitcoin, so I would still buy the Jade.
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