A USB stick that turns any computer into a temporary, offline blockchain key generator. You boot from it, it creates a seed phrase and receive addresses for Bitcoin, Ethereum/EVM, and Solana, you copy them onto paper, and you pull the plug — destroying the environment that made them. One stick creates unlimited keys, forever. It never stores anything.
The first batch ships in under 30 days from order, with free tracked US shipping. You’ll get the tracking number the day it ships. Every stick is verified against the published hash and sealed in a tamper-evident bag before it leaves.
Different job. A hardware wallet stores your key forever — a permanent target that you must trust for years (and in 2026, the most respected one turned out to have generated weak keys, silently, for five). KŌINIkeystick holds a key for minutes, hands it to paper, and ceases to exist. There’s nothing to steal, nothing to fail later, and the output restores in any wallet ever made.
It’s gone, and we cannot help you — nobody can. That is the entire point of the product: no copy exists anywhere, including with us. Any provider who claims they can recover your keys is quietly holding your keys. Guard the paper accordingly, and consider our backup-verification step non-optional.
Structurally impossible — not a policy, an architecture. The generation path has no network capability, our infrastructure is never involved, and the code is public so you can confirm both. Your keys never touch anything we control, not for one millisecond.
Because they’d be theater on this product. Those protect the secrecy of stored data — our stick stores nothing secret; its contents are deliberately public. The threat that matters is tampering, which is why the read-only edition has a physical write-protect switch and why every stick verifies against a published hash. We don’t add security that doesn’t raise attacker cost — it just raises price and false confidence.
The read-only edition adds a physical write-protect slider: once locked, no computer can alter the stick’s contents, ever. Perfect for reuse across many machines and years. The standard edition is ideal for a single careful owner. Both run the identical, identically-audited generator.
Intel Macs can boot the standard editions. Apple Silicon Macs (2020+) can’t boot external systems at all — so the for Mac editions run the ceremony in a sealed, network-less sandbox inside macOS. Honest difference: bootable editions destroy the environment as a matter of physics; the Mac editions are a sealed room inside a running system. If you’re protecting serious value and own only a modern Mac, any PC — even a $60 used laptop — runs the full bootable ceremony.
Don’t use it — email support@koini.io for a replacement. And know the seal isn’t the only protection: you can verify any stick’s contents byte-for-byte against our published hash regardless of what happened to the bag. The stick is yours to guard; if it’s lost or compromised, you replace it — that’s cold-storage discipline, not a subscription.
No — the operating system is closed and sold only on the stick. That keeps it from being cloned, counterfeited, or forked into a tampered copy under our name. You don’t need the source to trust it: every stick is verifiable against our published hash (proof it’s authentically ours), the entropy path is reviewed by an independent security firm before we ship (proof it’s sound), and it arrives under a tamper-evident seal. Verify, don’t trust — without us handing the blueprint to counterfeiters.
Yes — BTC, ETH, and SOL at checkout alongside cards, Apple Pay, and Google Pay.
14 days, unopened tamper seal only, refunded minus shipping, handling, and a repackaging fee. A broken seal voids return — we will never reship a stick that left our custody unsealed, and you wouldn’t want us to.
