For all our technical savvy and disruptive startups, physical package delivery is still the backbone of ecommerce. The Slice app automatically detects shipping details from your email and then tracks the packages for you. You can watch your precious commodities make their stately way to your doorstep, get alerts when they are delivered, and even receive warnings if they've been recalled or the price has dropped. In short, Slice is an online shopper's best friend. Droid Apps
Remember the bad old days of ordering food? You needed takeout menus, knowledge of the terrain ("will they even deliver out here?"), cash, and faith that the person jotting down your order got it right. Seamless takes care of all that, even letting you pay via credit card from your Android. The only drawback? It's not available in every city (or even every state), though it has expanded its range dramatically since it was first included on this list. Android App
If you're looking to learn another language, Duolingo gamifies language learning with bite-sized lessons and a friendly interface. Starting with simple vocabulary and building from there, Duolingo is your guide to learning a new language or brushing up on one you already know. The more you use the app, the more you unlock and—with practice—the more you learn. This free app currently supports Danish, Dutch, French, German, Irish, Italian, Portuguese, Spanish, and Swedish. Or more practical choices, like Esperanto and Klingon. Android App
There's no shortage of Reddit apps on the Google Play store and choosing one over another ultimately comes down to preference, but reddit is fun (RIF) is a great option to try. The default view features a dense, text-heavy layout which puts the best (and worst) of Reddit front and center. There's both a light and dark theme and tons of layout content customization options to try out, even if you don't opt for the paid version. Better yet, there are no ads in either version or RIF and its overall performance is extremely quick. New Droid Apps
Despite ups and downs in the quality of its library, Netflix dominates the world of streaming TV and movies. The service also creates its own—sometimes indispensable—content, including original comedies, cartoons, dramas, and documentaries. Some of the shows have become cultural phenomena, making Netflix a must-have. Shows such as Black Mirror, Stranger Things, and The Crown (the most expensive TV show ever made) are often the conversation topics of the day. You can even download select episodes to watch offline at your leisure.

Slack has gone from the new hotness, to controversial productivity tool, to essential office tool faster than you can say "hot take." With a familiar, instant messenger feel, it's easy to get started with Slack. But the service became popular because of its wealth of advanced features, like customizable alerts and a Do Not Disturb function. You can even host VoIP calls through Slack with your coworkers. A free account will get you started, but a monthly fee unlocks even better search tools. And be sure to install the Giphy plugin for maximum productivity. Android App
Kaspersky for Android bundles on-demand malware scans and active web protection. Additionally, it implements a host of anti-theft features including remote locate, lock and wipe, as well as the ability to sound an alarm. You can even lock apps behind a PIN as an extra preventative measure in case your phone gets stolen. Although you need a paid Kaspersky Internet Security subscription to use all its features, some basic functionality is available for free. It's a top choice for Android antivirus apps. New Droid Apps
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. Droid App
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