Green Address wallet was founded by Lawrence Nahum and Jerzy Kozerc in 2013. It is a single Currency wallet in that it only supports BTC. It does not support any flat Currency. The wallet since then has been in operation allowing users to buy, sell and store BTC.
Everyone has what he loves in a cryptocurrency wallet. For those who put security first, green address will really appeal to such one. The security features are rich. It uses multifactor authentication like Google authentication, 2 factor authentication, PIN etc.
In addition, users Private keys are not kept by any third party.
It is also a wallet with multisignature features, so it is suitable for individuals and businesses.
But personally I will not go for a single Currency wallet in an age where there are several multicurrency wallets that possess all positive features in green address. Beside this, research revealed users dissatisfaction with the wallet. Among other things, they complained about high fee and slow transaction.