What we are building and learning
Product notes from the Nuri team, plus honest Bitcoin reviews that name the real weaknesses and cite the sources behind them.
Building Nuri for the days when something breaks
If one payment route stops working, the whole app should not feel broken. Here is what we learned and what we are changing.
Read the note →Broken Money: The Best Money History Book, If You Can Sit Still
Lyn Alden's dense, engineering-first history of money is the most measured Bitcoin-adjacent book in print, but it is not light reading.
Broken Money — Lyn Alden →The Bitcoin Standard: Genre-Defining, and Aging Unevenly
The book that made 'hard money' mainstream in Bitcoin is influential, quotable, and heavily biased, and its central scarcity model has not held up.
The Bitcoin Standard — Saifedean Ammous →Mastering Bitcoin: The Developer Bible That Isn't For Beginners
The definitive technical reference to how Bitcoin actually works, free on GitHub, and genuinely hard going if you don't code.
Mastering Bitcoin (3rd ed.) — Antonopoulos & Harding →Blockclock Mini: A Beautiful $399 Number That Trusts a Server
Coinkite's eInk price-and-block display is a well-built object of desire, but it is a Wi-Fi novelty that leans on a trusted price API, not a trustless device.
Coinkite Blockclock Mini →Cryptosteel Capsule: Fireproof and Fiddly, With One Real Weakness
The original stainless-steel seed capsule survives fire and water in independent testing, but the tile system is tedious and it's the one design that can fail if crushed.
Cryptosteel Capsule Solo →Bitaxe Gamma: The Honest Case for a $150 Lottery Miner
A silent, open-source ASIC that mines almost no bitcoin in expected value — and is still one of the best gifts you can give a curious hodler.
Bitaxe Gamma →FutureBit Apollo II: A Great Node That Also Mines a Lottery
One quiet desktop box runs a full Bitcoin node and mines solo — an appealing sovereignty appliance wrapped around miner economics that still don't add up.
FutureBit Apollo II →Blockstream Jade Plus: Fully Open, With a Security Model to Understand
A cheap, fully open-source signer with an excellent QR camera — built on a general-purpose ESP32 and a blind-oracle design you should understand before you trust it.
Blockstream Jade Plus →Foundation Passport Core: The Air-Gap Purist's Beautiful Signer
No USB data, no radios, a phone-like keypad and fully open firmware — a genuinely air-gapped Bitcoin-only wallet that treats design as a feature.
Foundation Passport Core →Ledger Nano X: Slick, Popular, and Still Asking for Trust
A polished, Bluetooth-enabled wallet from a company whose security promises have been tested more than once.
Ledger Nano X →Trezor Safe 5: Open Source Grows Up and Adds a Secure Chip
The first genuinely touch-friendly Trezor finally pairs open firmware with a real secure element — but it is no longer the top of the range.
Trezor Safe 5 →BitBox02 Bitcoin-only: Swiss, Open, and Refreshingly Boring
A small, audited, fully open-source Bitcoin wallet that does the fundamentals right and asks little of you — if you can live with the tiny screen.
BitBox02 Bitcoin-only →Keystone 3 Pro: Big-Screen Air-Gapping With a Trust Asterisk
A slick, fully air-gapped QR wallet with three secure chips and a big touchscreen — whose openness and origins deserve a closer look.
Keystone 3 Pro →