The problem with Tersorit is that it doesn't encrypt files locally. You need a 3rd party solution for that for some bizarre reason.
Boxcryptor could be part of that, if you stick to desktop clients. The mobile implementations are not their priority and are often buggy to the point of usability.
Also, the mobile apps don't seem to have been thought out well enough. It seems like a subset of cloud storage providers only, and no support whatever for local cloud.