Cuvex vs Stacked

Zero-Knowledge Policy Cuvex never requests, stores, or processes personally identifiable information. You can manage your Cuvex cards and use the app without ever revealing any personal data not even your email address! Intuitive and User-Friendly Experience Our app is designed to be exceptionally simple and intuitive. Whether you're a seasoned crypto professional or just entering the world of blockchain technology, you’ll enjoy a seamless experience from the very start. 1. Monitor Wallet Balances “Watch Only” The app enables you to view real-time balances of your wallet(s) in a secure, watch-only mode. 2. Manage Your Cards For security reasons, we advise against physically labeling your Cuvex cards. Instead, you can visually track them in the app using the aliases you've assigned via your Cuvex device. Cuvex will notify you when it's advisable to clone your cryptogram to a new card, since the typical card lifespan is approximately 10 years or 15,000 usage cycles. 3. NEW Sign PSBT Transactions with Dual Airgap First Airgap: Configure the transaction within the app. Select the amount, choose UTXOs, add recipients, set transaction details, and adjust fees. Once configured, the transaction is recorded directly onto a Cuvex NFC card. Second Airgap: For final signing, the Cuvex device will prompt you to scan a second card that securely stores your encrypted seed phrase and private keys. This ensures a fully offline signing process completely isolated from internet-based vulnerabilities. 4. Comprehensive Coin Control Features Take full control of your Bitcoin management: Account Management: Create new accounts quickly and easily. Smart Transaction Labeling: Annotate each transaction with metadata such as observer, amount, and purpose to prevent address reuse. UTXO Management: Freeze specific UTXOs to avoid unintended spending and gain an extra layer of privacy control over your funds. Label and Descriptor Export: Backup your labeled metadata with a tag file, allowing seamless wallet migration to a new smartphone whenever needed. 5. Firmware Updates Keeping your Cuvex device updated is not only essential for security, but also enables access to all the latest features we roll out. You can sync your Cuvex device via a fully encrypted Bluetooth connection with asymmetric key exchange and firmware hash validation. This ensures a completely secure update process no need to connect it to a computer. Embrace Sovereign and Secure Self-Custody!

Stacked Self-custody POS turns your iPhone into a Lightning point of sale that charges straight to your own lightning address. There is no Stacked account, no API key and no server in between. The app never holds your money — payments go from your customer to your wallet. HOW IT WORKS Enter your lightning address once. When you take a sale, the app asks your own address provider for an invoice, shows it to the customer as a QR code, and watches for it to be paid. The moment it settles you get a receipt. The sats land in your wallet, not ours. TAP TO PAY WITH BOLT CARDS Hold a bolt card to the phone and the invoice is paid by tap. The card's own service does the paying — the POS only hands it the invoice. PRICED IN YOUR CURRENCY Ring up sales the way you always have: type 1 2 5 0 and charge $12.50. The app converts to sats at the live bitcoin price and shows both. Over 150 currencies, or switch to SAT and price in sats directly. The rate comes from public price sources, and the app tells you how old it is — if the price goes stale, charging pauses until it refreshes, so you never sell at a rate you cannot see. YOUR SALES, ON YOUR PHONE Every invoice the till creates is kept on the device, newest first, grouped by day with the day's takings. Each sale shows whether it was paid, is still waiting, expired or was cancelled, and opens to reveal everything recorded for it: the rate it was priced at, the times, how it was paid, the payment hash and preimage. Nothing is uploaded anywhere. WHAT YOU NEED - A lightning address whose provider supports LUD-21 payment verification. The app checks this during setup and tells you if your provider will not work, because without it there is no way to confirm a payment. - An internet connection. - For tap to pay: an iPhone with NFC. WHAT THIS APP DOES NOT DO - It does not hold, custody or move your funds. It cannot spend from your wallet. - It does not issue refunds. Refunds are between you and your customer. - It has no accounts, no sign-up, no analytics and no ads. - It does not sync between devices. The sales list lives on this phone only. OPEN ABOUT THE TRADE-OFF Self-custody means the responsibility is yours. Your lightning address provider is who actually receives your money, and this app is only the till that asks them for invoices. If your provider goes down, you cannot take payments. If you reset the app, the local sales list goes with it.