Among user favorites, GreenAddress gives you access to your Bitcoins through a variety of methods, online, mobile app, or desktop. It is considered friendly. It is one of the most flexible portfolios. It is multi-signature and has strong security and privacy features.
Very flexible and very easy to use, which makes Green Address an excellent choice for beginners
Requires the use of a remote application loaded from another location and shared control of your Bitcoins (which means the third party must approve the payments).