CoolWallet
CoolWallet is the hardware wallet brand of CoolBitX: credit-card-sized wallets that are managed entirely through a phone app, with an e-paper screen and button on the current model.
What Is CoolWallet?
CoolWallet is the hardware wallet brand of CoolBitX, a company founded in Taipei, Taiwan, in 2014. Its wallets are the size of a credit card and are managed entirely through the CoolWallet app on iPhone and Android.
The current model, the CoolWallet Pro, connects to the phone over Bluetooth. It has a small e-paper screen and a button, so a transaction can be checked and confirmed on the card itself, and it keeps the keys in a secure element. The line also includes a screenless NFC card, the CoolWallet Go.
The backup is a standard BIP39 seed that can be generated on the card. According to the company, the app covers more than 35 blockchains, custom EVM networks and WalletConnect.
The card format has costs. CoolWallet works with a phone only: there is no USB data connection and no desktop app. CoolBitX publishes the Pro's secure-element firmware source under a non-commercial licence and its developer SDK as open source, but the app and the Bluetooth-chip firmware are closed. The EAL6+ rating is claimed without a published certificate. Firmware updates are authorised by a CoolBitX server, and there are no hashes a user could verify independently.
A hardware wallet is a dedicated device that keeps private keys offline and signs transactions internally, so the keys never reach an internet-connected computer or phone.
Bluetooth Connectivity enables wireless communication between devices, like hardware wallets and smartphones, using Bluetooth or Bluetooth Low Energy (BLE) for secure data transfer.
Read full definition: Bluetooth ConnectivityA secure element is a tamper-resistant chip built to store secrets and resist physical attacks such as side-channel analysis and fault injection.
Read full definition: Secure ElementNFC Connectivity in cryptocurrency enables contactless transactions using near-field communication, allowing users to sign or authorize actions by tapping their device to a reader.
Read full definition: NFC ConnectivityA backup in cryptocurrency is a secure copy of a wallet's seed phrase or private keys. It enables recovery of funds if the original wallet is lost or damaged.
Read full definition: BackupBIP39 is a standard for generating mnemonic seed phrases that are used to create deterministic wallets and securely back up cryptocurrency private keys.
Read full definition: BIP39A blockchain is a shared, append-only record of transactions kept by many independent computers, so no single party can rewrite it.
Read full definition: BlockchainThe EVM (Ethereum Virtual Machine) runs smart contracts on Ethereum and on compatible chains, which share its address format and tooling.
Read full definition: EVMWalletConnect is a protocol that enables secure communication between decentralized applications (dApps) and mobile wallets through QR code scanning or deep linking.
Read full definition: WalletConnectFirmware is the software that runs on a hardware wallet itself: it generates keys, shows transaction details on the screen and signs.
Read full definition: FirmwareEAL certification (Evaluation Assurance Level) under Common Criteria shows how rigorously a hardware component, such as the secure chip of a hardware wallet, was evaluated, from EAL1 to EAL7.
Read full definition: EAL CertificationA firmware update installs a new version of the software that runs on a hardware wallet, to close security holes, fix bugs or add coins and features.
Read full definition: Firmware UpdateReal-World Examples
Example 1: A user prepares a payment in the CoolWallet app. The CoolWallet Pro receives it over Bluetooth, shows the details on its e-paper screen, and signs when the button on the card is pressed.
Example 2: Someone who manages crypto only from a desktop computer finds that CoolWallet does not fit: the cards have no USB data connection and there is no desktop app, so a phone is always required.
Bluetooth Connectivity enables wireless communication between devices, like hardware wallets and smartphones, using Bluetooth or Bluetooth Low Energy (BLE) for secure data transfer.
Read full definition: Bluetooth ConnectivityCoolWallet hardware wallets
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Frequently Asked Questions
Can I use a CoolWallet with a desktop computer?
No. CoolWallet works with a phone only: the cards have no USB data connection and there is no desktop app. Everything is managed through the CoolWallet app on iPhone or Android, so someone who handles crypto only from a desktop will find it does not fit.
Can I check a transaction on the CoolWallet Pro itself?
Yes. The CoolWallet Pro has a small e-paper screen and a button, so a transaction received from the app over Bluetooth can be checked and confirmed on the card. The screenless CoolWallet Go does not offer this.
What parts of CoolWallet can be independently verified?
Only some. CoolBitX publishes the Pro's secure-element firmware source under a non-commercial licence and its developer SDK as open source, but the app and Bluetooth-chip firmware are closed. The EAL6+ rating is claimed without a published certificate, and firmware updates are authorised by a CoolBitX server with no hashes a user can check.
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