Streaming services are all the rage, but if you still keep music locally, BlackPlayer is worth your attention. We particularly like the Discover option, which shuffles through 10-second previews of seldom-played tracks in your library continuously, until you decide on what to listen to next. There's also a built-in tag editor and a ton of customization options for button styles, fonts, themes, and now playing notifications.
The library is an often-overlooked public resource (and some are modernizing quickly), but OverDrive brings it back into the fold with the newly redesigned, Libby. Supported by over 30,000 libraries worldwide, the app lets you access your local library's array of available ebooks and audiobooks. Use it to download titles, place holds on titles not yet available, and consume your borrowed content. The only requirement is a library card (or its digital equivalent).
This calorie counter and exercise tracker aims to help you lose weight the old-fashioned way—expending more calories than you take in. With its smart design and an extensive library of foods, it makes quickly logging the calories you take in and what you burn while exercising a snap. A barcode scanner makes it even easier to log that post-workout snack. This fitness app also plays nice with other such apps, so your data won't be tied up in just one place. MyFitnessPal won't give you a whole workout regimen, but it can make you more aware of your habits. PCMag has a full review of MyFitnessPal for the iPhone.
File browsing is something everyone inevitably has (or wants) to do, so you might as well do it with a capable, fantastic file browser. Solid Explorer is pretty much as good as it gets in the file explorer apps realm. It features Material Design, archiving support, support for the most popular cloud services, and even some more power user stuff like FTP, SFPT, WebDav, and SMB/CIFS support. It looks great, it’s incredibly stable, and it just works well. There is a 14-day free trial with a $2.99 price tag at the end of it. This is, by far, the best file manager on Android for most people. Droid App