Been researching
@Keycard_ for weeks and this is getting wild
➥ Remember when hardware wallets meant chunky USB dongles? Those days are over. What I found in my research changed how I think about crypto security.
✦ The Shell just launched pre-orders in April 2025 ✦ - shipping October. This isn't just another hardware wallet.
➥ It's a modular system where you slip credit-card sized "Keycards" into a Shell device with screen, keypad, and camera.
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✦ Here's what caught my attention:
⪼ 100% MIT-licensed firmware - every line of code is public
⪼ Works with MetaMask, Rabby, BlueWallet, Sparrow, imToken via QR codes
⪼ 18 hour battery on replaceable Nokia BL-4C (when did you last hear that?)
⪼ Air-gapped QR signing using EIP-4527 standard
⪼ Duress PIN feature - enter special code under threat, generates different wallet addresses
✦ Let's talk Market context how actually big it is.
Hardware wallet market hitting $583M in 2025, growing 24.2% annually. North America leads adoption, but everyone's still stuck with USB devices.
✦ The problem they're solving
Current wallets force you to trust closed firmware or deal with cables.
Shell costs €99 with 2 cards vs Tangem's $59-79, but you get a trusted display and open source everything.
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✦ Hidden detail nobody talking about so I decided to mention this
They have a "Cash applet" - separate keypair for low-security stuff like event tickets. Completely isolated from your main wallet, no PIN needed. Smart move for everyday interactions.
✦ vs Competitors breakdown:
⪼ Ledger/Trezor: USB-dependent, closed ecosystems
⪼ Tangem: Had genuine-check bypass vulnerability in 2024, closed firmware
⪼ Shell: Open source, works everywhere via QR
➥ Team behind it: Built by the Status Network crew (
@ethstatus) - the decentralized messaging people.
@keycard_. Been building since 2018, now on applet version 3.1.0.
What's happening right now: Pre-sale launched April 23rd with exclusive discounts, global release October 2025. First batch selling fast.
The genius part is Cards work without Shell too - just tap your phone's NFC or use USB reader on desktop. Lose the Shell? Buy another. Cards are your real security.
✦ Look at some technical specs that matter
⪼ EAL6 JavaCard secure element
⪼ 1.8" OLED display keypad
⪼ NFC, QR (ERC-4527/UR 2.0), optional USB-C
⪼ Supports Bitcoin (SegWit & Taproot), Lightning, all EVM chains
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This isn't just another hardware wallet launch. It's the first truly open, modular approach to self-custody.
When the market's projected to hit $3.3B by 2033, betting on transparency feels right.
My take: Hardware security shouldn't be a black box. Shell makes it crystal clear.
CC ♡
@0xcyp,
@PajicF,
@thecybermonk @0xnadeem @ethstatus @statusl2 Team