YDWallet vs Custos Clavium

YDWallet is a simple cryptocurrency wallet, which allows you to store and use cryptocurrency directly on your device. Currently the app supports Ethereum and Ethereum-based (ERC20) tokens. We plan to add support for more (eg Bitcoin) in the future. ** App Features ** YDWallet lets you easily store and transfer cryptocurrency. - Send and receive cryptocurrency - Send to nearby users - Send to address by scanning a QR code - Create QR code and links for others to scan to send cryptocurrency to you - Sync encrypted accounts between your devices via iCloud - Create your own cryptocurrency or token with our automatic ERC20 smart contract generator - Backup the private keys of your accounts - See an estimation of your cryptocurrency's value in US$ ** Ethereum Features ** - Create new Ethereum accounts with their own receive address - Monitor Ethereum addresses and transactions - Transactions are signed offline directly on your device Signed transactions are sent to the Ethereum network via proxy servers, so you don't need the full blockchain on your device. ** ERC20 Features ** ERC20 tokens are cryptocurrencies which run on top of the Ethereum network. You can create an account to hold any ERC20 token, either by selecting from our list of top tokens, or by scanning or entering the Contract Address of the token. YDWallet will also automatically detect any incoming tokens to your Ethereum account. YDWallet also allows you to create your own ERC20 token or currency, with either a fixed initial supply of tokens, or with a flexible supply that allows you to generate more coins whenever you want. ** Security Features ** All account private keys are stored in your device's Keychain and synced between your devices with iCloud. All transactions are signed offline on your device directly before being sent to the network. For extra security, you can lock your accounts with a password you choose. All transactions are created and signed directly on the device, no third-party servers see your private keys Signed transaction data is distributed via blockchain proxy servers to prevent needing the full blockchain on your device ** Caution ** Storing large amounts of cryptocurrency is best done with an offline cold storage wallet.

Custos Clavium is a secure NFC companion that helps you manage sensitive data without storing secrets on your phone. With Custos Clavium, your NFC card is the single source of truth for passwords, notes, OTP accounts, and wallet keys. The app provides a secure interface to view, organize, and use this data through encrypted communication and card-based authentication. Use Custos Clavium to: • Access passwords and secure notes • Manage OTP accounts and generate time-based codes • Create and manage wallet records linked to keys stored securely on the card • View public wallet addresses and network data (when internet access is enabled) • Sign supported blockchain transactions with the card • Organize slots, labels, and records without moving secrets off the card Custos Clavium is designed around a simple principle: secrets stay on the card. The app does not store private keys, wallet secrets, seed phrases, or other sensitive data as long-term local backups. Sensitive operations require card presence and NFC interaction. Features: • NFC-based secure access • Card-first secret storage • Passwords, notes, wallets, and OTP records • BIP39-assisted input • Wallet derivation support • On-card signing for supported flows • App PIN and biometric protection • Configurable network and internet access settings Custos Clavium is built for users who want stronger separation between their mobile device and their secrets, while keeping everyday access practical and fast.