Arculus Wallet

Arculus is a self-custody crypto wallet built around a physical “Key Card” and a companion mobile app. The product is designed to keep private keys offline on a secure element embedded in a metal card, while allowing users to manage assets and authorize transactions on an NFC-enabled smartphone. Arculus positions the wallet for users who want cold storage protections with a mobile-first experience for assets such as Bitcoin, Ethereum, and other supported networks and tokens.

Overview

Arculus uses a card-and-app model rather than a USB-connected hardware device. The Arculus app runs on iOS and Android and is used to view balances, initiate sends and receives, and access features such as swaps and fiat purchases where available. Transaction authorization requires possession of the Arculus Key Card and local device authentication, which is intended to reduce reliance on browser extensions or always-online hot wallets.

History and Background

Arculus was created by CompoSecure, a company known for manufacturing secure cards used in payments and identity applications. The Arculus wallet adapts that card-based security approach to digital assets by storing cryptographic keys inside a secure chip embedded in a metal card, with a companion application handling the user interface and blockchain interactions.

Core Products and Services

• Arculus Key Card cold storage: A metal card that generates and stores private keys in a secure element and is used to authorize actions via NFC tap.
• Arculus mobile app: An iOS and Android app for managing accounts, viewing holdings, and preparing transactions.
• Asset management: Support for a broad selection of cryptocurrencies and tokens, including NFT support as promoted by the product.
• Swap, buy, and sell tools: In-app services for swapping crypto and purchasing crypto using third-party providers, with fees and availability determined by those providers and jurisdiction.
• Web3 connectivity: Support for connecting to decentralized applications using WalletConnect, and referenced compatibility with MetaMask-based workflows for accessing DeFi and other Web3 apps.

Technology and Features

Arculus emphasizes “true cold storage” by keeping private keys on the card’s secure element rather than on the phone. The wallet uses a three-factor authentication model: something the user has (the Arculus card), something the user knows (a PIN), and something the user is (a biometric check, such as face or fingerprint, depending on the phone). The card is designed to be battery-free and does not use USB or Bluetooth, with NFC used for tap-to-authorize interactions.

From a hardware standpoint, Arculus describes its secure element as CC EAL6+ certified, and it states that private keys never leave the secure chip. The company also states the card can hold multiple accounts for different cryptocurrencies, and it references on-card memory capacity as a factor in how many keys can be stored. On the software side, Arculus promotes broad coverage across coins, tokens, and blockchains, and it highlights custom token support on major EVM networks, including Ethereum, Polygon, and Binance Smart Chain.

Use Cases and Market Position

Arculus is commonly positioned as an everyday-carry cold storage option for users who want hardware-backed signing without a dedicated USB device. Typical use cases include long-term self-custody of major assets, holding a multi-chain portfolio with a single mobile interface, and interacting with on-chain services through WalletConnect when needed. The card form factor can also appeal to users who prefer a minimalist setup and do not want to manage cables, batteries, or desktop-only software.

For users active on EVM ecosystems, Arculus may be used alongside networks such as Arbitrum, Optimism, and Base, depending on the wallet’s supported blockchains and token coverage at a given time. Arculus also promotes NFT management in-app, which can be relevant for users who hold collectibles on supported networks.

Risks and Considerations

• Self-custody responsibility: Users are responsible for safeguarding access credentials and any recovery materials. Losing access can make assets unrecoverable, while exposure can enable theft.
• Phone and app security: Keys may be on the card, but phishing, malicious dApps, and unsafe approvals can still cause losses if a user authorizes harmful transactions.
• Third-party service dependence: Buy, sell, and swap features rely on external providers, and pricing, limits, KYC requirements, and availability can vary by region and asset.
• Network fees and irreversibility: On-chain transactions generally cannot be reversed, and fees vary by blockchain conditions.