Bither wallet can be used in hot or cold mode. It is as easy as cash or credit cards. Bither Cold Wallet features include cold wallet that runs in offline mode (Backup Phone), private keys are protected with digital password, realtime monitoring of network status (Wifi 3G BlueTooth), security check to ensure private keys, and sign unsigned transactions. They also automatically backup and recover. Hot Wallet features include hot wallet that runs online (Daily Phone), you can monitor your Bitcoin savings easily with Watch Only mode, and you can prepare unsigned transactions for watch only addresses. Hot wallet also supports private key, so you can save some money on this type of addresses.