If you're at all worried about sensitive data on your phone falling into the wrong hands then you should check out SPB Wallet.
When first run, SPB Wallet asks you to create your first encrypted wallet file. This stage includes a password strength test which will warn you if your password looks like it's too simple. Next, you're presented with a list of categories for data storage, headed by a very handy 'About SPB Wallet' section. This area contains a lot of guidance on how to use the program, template creation and more.
The number of categories and templates available is impressive enough, and that's before you factor-in the easy-to-use template creation tool. Most of the templates also have smart little icons - and again, you're allowed to create and import your own if you want.
SPB Wallet features 256 bit AES encryption, an industry standard, which is apparently very difficult to crack. The biggest risk to your data is probably your phone itself: always remember to back up important information regularly.
SPB Wallet represents an excellent data protection solution to give you peace of mind when carrying your phone around.