There are a lot of apps out there that pay lip service to security and privacy, but Signal was built from the ground up with the goal of letting people easily communicate without having to worry about being overheard. The Signal app is a complete phone and SMS client replacement (though it works just fine as a standalone app, too) for sending and receiving encrypted calls and messages. A recent update has greatly improved the app's look and feel, proving that security and usability don't have to be at odds.
Everyone needs to file their taxes every year. Most people will probably have an easier time using dedicated tax software (and some might still enjoy preparing them by hand), but more ambitions filers or those with simple tax returns can get away with using a mobile app. Intuit's TurboTax Tax Return App is the best one we reviewed this year. Among its top features are an excellent user interface, support for all major tax forms, and innovative help options. If you get stuck at any point, you can just open up the Virtual Assistant, which keeps a running dialogue of the help topics you searched for, or use SmartLook to connect to a tax expert via video chat. Droid App