Ledger Nano S Hardware Wallet (created by Ledger) is specially designed to store private keys securely. It is considered safer than desktop or smartphone wallets, mainly because it doesn't connect to the Internet at any point. These properties significantly reduce the attack vectors available to malicious parties, as it means that they can't tamper with the device remotely.
This page covers a list of coins supported by Ledger Nano S Hardware Wallet. Compare Ledger Nano S Hardware Wallet with other wallets ›