With Bitcoin QR Scanner - Coin Viewer you can easily scan your favorite cryptocurrency's addresses and immediately see how many funds are on that address. Currently supported cryptocurrencies are Bitcoin (BTC), Litecoin (LTC), Dogecoin (DOGE), Ethereum (ETH), Ethereum Classic (ETC) and NEO (NEO).
You can manually type in the address or just scan the QR code using the built in QR Scanner. Furthermore you can copy your already scanned addresses later on or even generate their QR codes so you can get paid by others in Bitcoin, Litceoin, Dogecoin or the other currencies.
All this works without entering the private key. Only scan or type in the public address. Never type in your private keys!