Technology

A tap. Then your wallet.

Cronyl is a metal card with a gold finish. Cronyl connects the card and the wallet. Made to last a lifetime. The card opens a wallet you configure — crypto, NFTs, or real world assets. It does not replace the wallet, and it does not join the transaction. Without fees from Cronyl, and Cronyl does not ask for private keys. Network fees, when a transaction has them, stay with the blockchain.

Cronyl Solana card, finished with gold
Cronyl card on a gray ground

Close range, on purpose.

The tap uses RFID technology, only across a few centimeters, not across a room. Your location and wallet address appear only on that tap, and only for a short time. A timer then closes the view. Cronyl connects the card and the wallet.

The card does not broadcast a seed phrase. It does not hand over a private key. A successful tap opens the wallet address you saved, up close, and nowhere else.

During setup you connect wallet addresses you control. Up to three per card. Each address belongs to a network. Bitcoin addresses are not Ethereum addresses. The card does not convert between them. It opens the one you configured. If a phone cannot complete the tap, the destination is still that address. Cronyl has nothing else to fall back to — no pooled balance, no custodial inbox.

How the pieces stay apart.

Metal card
A metal body with a gold finish. Made to last a lifetime. It carries the interface, not the funds.
The tap
The tap. A compatible iPhone or Android phone reads the card at close range.
Cronyl App
Where you choose up to three wallet addresses. Any mix of crypto, real world assets, and NFTs. Hot, cold, or self-hosted. They are set during setup and cannot be changed afterwards. It never asks for a private key or a seed phrase.
Your wallet
The application that actually holds keys and shows the balance. Cronyl does not sign for it.
The network
Whatever network the connected wallet already uses. Crypto, NFTs, or real world assets settle there, not inside Cronyl.
Cronyl, the company
Makes the card. Does not custody assets, does not store private keys, and without fees.
Cronyl Bitcoin card

Multi-wallet, still non-custodial.

Three addresses is the configuration of every card, Core, Gold, and Satoshi alike. One can be crypto. One can be a real world asset. One can be NFTs. The host can change between them. The others stay empty until you decide.

The card points at wallet addresses you set up. It does not log in as you.

The edition is optical. A gold name does not bind the card to that asset. The architecture stays the same: your keys, your wallet, a metal card you keep for life.

Assets and networks

Almost every asset. Your wallet is the limit.

Cronyl is not a closed list of coins. A tap opens the wallet you connected. That wallet can receive crypto, NFTs, or real world assets, on the networks it already supports. Cronyl supports more than 170,000 networks — the ones your wallet already supports. Chains can be added.

Bitcoin, Ethereum, XRP, Solana, stablecoins, and the long tail beyond them. If your wallet can receive it, the card can open that path. Cronyl does not convert networks, and Cronyl does not hold the asset.

Core, Gold, and the Satoshi card are the same card underneath. The edition is the finish. It does not choose the asset, the network, or the wallet host. Every card opens up to three addresses. The transfer settles in your wallet.

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The host does not matter. Every card opens up to three addresses.

Two ways the tap can open.

A browser

The phone opens the receive page directly in a browser. No Cronyl App is required to send or receive crypto.

The Cronyl App

The Cronyl App can provide an optional redirect to the selected wallet. It also supports wallet monitoring, market information and push notifications, depending on the available features.

Made to last a lifetime.

The card is metal, with a gold finish. There is no expiry and no subscription. The object is made to last a lifetime. You do not need the Cronyl App to send or receive. A tap opens the receive page in the browser. The Cronyl App can only forward to the wallet you chose.

In the app you can watch markets, switch incoming alerts off, and get a push at the first confirmed block, often faster than your wallet apps. The addresses stay as you set them during setup. Assets remain in your wallet. Without fees from Cronyl. Network fees, when a transaction has them, are shown in your wallet.

Cronyl Bitcoin card on a gray ground