Armony is defined on its website as the only open source wallet with cold storage and support for multiple signatures. This wallet is available for the storage of Bitcoin and its application is only available for computers.
Being a cold wallet it offers high level security features since it never connects to the internet.
In short, Armony is an open source wallet with cold storage that offers advanced security for the administration of Bitcoin, The wallet is limited for computers, it does not yet have a mobile application, and its website is not very striking. Its interface is comfortable for cryptocurrency experts, but for new investors it may seem a bit difficult to use.