Tangem

Tangem Wallet is a self-custody hardware wallet built around NFC-enabled cards and wearable form factors that work with a companion mobile app. Instead of using a USB connection or a dedicated screen, Tangem is designed to keep private keys inside a secure element and sign transactions when the card is tapped to a smartphone. The product targets users who want cold-wallet key storage with a setup that feels closer to everyday payment cards than traditional hardware devices.

Overview

Tangem Wallet combines a physical hardware component with a mobile application for iOS and Android. The hardware generates and stores the private key on the secure element, and the key is designed not to leave the device. The mobile app provides the interface for viewing balances, preparing transactions, and interacting with supported networks and tokens. Tangem markets support for thousands of coins and tokens, including major assets such as Bitcoin and Ethereum.

History and Background

Tangem is a Switzerland-based company, and it positions its wallet line around long-term durability and straightforward onboarding. The company offers a multi-card backup approach and highlights extended warranty coverage for the physical product. Tangem also publishes parts of its software stack publicly, including repositories for its mobile app and related tooling, as part of a broader transparency effort around wallet security and maintenance.

Core Products and Services

• NFC hardware wallet: Card-based hardware that signs transactions via NFC without a USB port, battery, or buttons.
• Mobile wallet app: An iOS and Android app used to view assets, create transactions, and manage wallet settings.
• Backup and recovery options: Support for setting up additional cards as backups, with an optional seed phrase mode available for certain wallet versions.
• Token management: Support for holding and managing a wide range of tokens and networks through the app interface.
• Swaps and purchases: In-app functionality for swapping assets and buying crypto through integrated third-party services, where available.

Technology and Features

Tangem’s security model centers on a secure element chip certified to Common Criteria EAL6+, a level typically associated with high-assurance hardware used in payments and identity systems. The private key is generated by the hardware random number generator inside the secure element and is intended to remain confined to the chip. When a user initiates a transaction, the app constructs the transaction data and the hardware signs it after the card is tapped to the phone.

Unlike many hardware wallets that rely on firmware updates, Tangem emphasizes an “immutable firmware” approach. The firmware runs inside the secure element and is designed to perform a narrow set of cryptographic operations. Tangem has publicly stated that its firmware has undergone third-party security audits, while the companion app code is published on GitHub for external review. This split design aims to keep key material isolated in certified hardware while allowing the user-facing application layer to be reviewed and maintained more openly.

Durability is also a notable part of the product’s positioning. Tangem states the card is designed for harsh environmental conditions and promotes an IP69K rating for resistance to dust and high-pressure water exposure. This focus reflects the product’s “carry it every day” concept, where the wallet can be stored in a regular card holder rather than a dedicated device case.

Use Cases and Market Position

Tangem Wallet is commonly used for cold storage in a mobile-first workflow. Typical use cases include long-term custody of major assets, managing a multi-asset portfolio from a phone without exposing keys to a computer, and keeping a compact hardware wallet available for travel. The NFC tap-to-sign interaction can be appealing to users who want hardware-backed signing without cables, desktop apps, or device-specific drivers.

Within the hardware wallet market, Tangem competes with USB-connected devices and air-gapped products by prioritizing simplicity and portability. The tradeoff is that the user experience depends on having a compatible smartphone with NFC, and the wallet’s security posture also depends on a user’s ability to verify dApp interactions and transaction details presented by the app.

Risks and Considerations

• Self-custody responsibility: Users are responsible for backups and recovery. Loss of recovery materials can make funds unrecoverable, while exposure can enable theft.
• Phone-based workflow: Transactions are initiated through a mobile app, so device security, phishing resistance, and safe link practices remain important.
• Smart contract risk: Tokens and dApps can involve approvals and contract calls that create loss scenarios, especially on programmable networks.
• Third-party service dependencies: Buy and swap features may rely on external providers, which can introduce fees, limits, and jurisdiction-based availability differences.