Nine is a very reliable email client designed to work with all of your accounts. The clean interface and the optional conversation view make reading and replying to email intuitive. One of the coolest features is the ability to customize the notification actions, including an incredibly useful "Mark as read" option. It isn't cheap, but it's only a one-time $14.99 charge for a much-improved email experience that also integrates calendar, contacts, notes, and tasks functionality.
The big risk is malware. In our Android app security basics article, we recommended sticking to Google Play and avoiding third-party app stores. The security policy on different Android app stores will vary; some will perform similar safety checks to Google, while others won’t. If you are going to take the risk, then consider installing one of the top Android security apps first. New Droid Apps Marking one of Apple's first forays into Android development, Apple Music brings the company's impressive musical catalog to Android. The app is built around Apple's subscription-based streaming service, which dishes up all-you-can-listen music for $9.99 per month, or just $4.99 for eligible students. It suffers a bit on Android for being divorced from the Apple ecosystem, however. Droid App