The OneKey Classic 1S makes EAL6+ security, open-source firmware, and independent transaction signing accessible for $99. At a price point that often gets compromised hardware, the Classic 1S stands out for delivering the same certification standard as $249 wallets — with a physical OLED screen — for under $100. This review gives you the full picture.
Updated April 2026 · 11 min read
Unique in the sub-$100 tier: The OneKey Classic 1S is the only sub-$100 wallet in its tier that offers both an independent OLED device screen AND open-source secure element firmware. Most budget wallets offer one or the other; Classic 1S delivers both.
The Classic 1S uses an EAL6+ certified secure element — the highest practical certification for embedded security chips. EAL6+ testing covers fault injection attacks, power analysis (SPA/DPA), electromagnetic side-channel probing, and laser fault analysis. Private keys are generated inside the chip and never exposed. No successful public key extraction from OneKey's SE has been documented.
What makes OneKey's SE stand out at this price: the firmware running on it is fully open-source. Most hardware wallets — including Ledger — keep secure element firmware closed and proprietary. OneKey publishes the SE firmware on GitHub alongside the main firmware, making it the most transparent security architecture at the sub-$100 price point.
OneKey is one of only two major hardware wallet brands (alongside Trezor) that open-sources both main firmware and secure element firmware. Every line of code running on the Classic 1S is on GitHub and can be independently audited by the security research community. This matters: open-source firmware means backdoors cannot be silently introduced without public detection.
The 1.54" OLED screen on the Classic 1S shows transaction details — recipient address, amount, coin type — before you press the confirmation buttons. You verify what you're signing on an independent screen that isn't the same computer or phone processing the transaction. This is the fundamental protection that software wallets and phone wallets cannot provide.
The monochrome OLED with anti-glare coating and 128×64 resolution is smaller than Trezor or Ledger's displays, but it's entirely adequate for reading transaction details. Bitcoin addresses display clearly. ETH amounts and contract interactions are shown before confirmation. Two physical buttons handle navigation and confirmation — a simple, proven interface that's less likely to be spoofed than a touchscreen.
The Classic 1S includes a 110mAh battery, enabling Bluetooth connectivity to your phone without a cable. For users who frequently check balances or approve transactions from mobile, this is a quality-of-life advantage over the USB-only Trezor Safe 5. The battery also means the device is self-powered for device-side operations (though a computer or phone is needed to actually broadcast transactions).
The OneKey app (iOS and Android) manages the wallet interface, transaction signing, portfolio view, and coin support for 5,000+ assets. The app connects via Bluetooth or USB-C. Third-party wallet support includes MetaMask integration for DeFi use. Coin breadth is comparable to Ledger — more than adequate for most users holding a diversified portfolio.
Classic 1S ($99): Best if you want Bluetooth wireless use and don't mind paying $20 more for the battery. The sweet spot for most first-time OneKey buyers.
Classic 1S Pure ($79): Best if you set up your wallet and rarely connect it — the HODL-first model. No battery means less complexity and $20 savings.
OneKey Pro ($278): Best if you need air-gapped transaction signing (camera QR scanning), a large colour touchscreen, and fingerprint authentication. Full security for advanced users and those holding large positions.
The Classic 1S ($99) and Trezor Safe 5 ($129) are the most credible open-source wallets at their respective price points. Both have EAL6+ SEs and open-source firmware. The $30 difference buys you: a larger colour touchscreen on the Safe 5 (1.54" colour vs 1.54" monochrome), haptic feedback on the Safe 5, and Shamir Backup. The Classic 1S has Bluetooth by default; the Safe 5 is USB-C only.
If $99 is your hard limit and you want a real device screen and open-source firmware, the Classic 1S is the clear pick. If you can stretch to $129 and want a colour touchscreen, go with the Trezor Safe 5. Full affordable wallet comparison: best affordable hardware wallets 2026.
Yes. At $99 it's the best sub-$100 wallet with an independent device screen and open-source firmware. EAL6+ SE, Bluetooth, battery included, 5,000+ coins. If $99 is your budget limit, this is the right call. For $30 more, the Trezor Safe 5 adds a colour touchscreen.
Battery. The Classic 1S ($99) has a 110mAh battery for Bluetooth wireless use. The Pure ($79) is battery-free, USB-C only — better for HODL-first users. Security is identical; the Pure is $20 cheaper and lighter.
Yes — both main firmware and SE firmware are open-source on GitHub. OneKey and Trezor are the two major wallet brands with fully open-source SE firmware. Ledger's SE firmware is closed-source.
The Pro ($278) adds a large 3.5" colour touchscreen, air-gapped camera signing, fingerprint sensor, and NFC. The Classic 1S covers the needs of most users at a third of the Pro's price. Consider the Pro if you need air-gap signing or want a flagship touchscreen device.
Buy from the official OneKey store. Open-source firmware, EAL6+ security, and a real device screen — all for under $100.
Buy OneKey Classic 1S →