For developers, it could be a good source of extra income. That said, some developers have reported huge download numbers off the back of the free app of the day promotion, but no resulting increase in sales once the promotion is over. You are also likely to do better with tablet optimized apps than smartphone apps in general, as Kindle users are the primary customers.
Calibre is the giant of ebook management, and this app is the perfect (ahem) companion for it. With just a few clicks, you can add any book from your computer to your eReader over USB or Wi-Fi. You can also store your ebooks on the cloud for easy access from wherever you are. What's so surprising is how well it works, and how easy it is to use. If you've got a lot of ebooks and are ready to cast off the shackles of Amazon, this is the app for you.

Twitch is the best way to watch people play games or pursue their creative hobbies on your mobile device. From eSports to cooking to music and more, there's likely some content on Twitch that everyone can enjoy. If you are feeling generous, you can also support your favorite creators directly from the app. Twitch Prime members can also claim free games and in-game loot each month.
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
CloudCal offers one of the most unique ways of showing you how busy you are on any given day. The Android exclusive uses a system it calls Magic Circles, which turns the days of the month into clock faces and shows different colored circles, or segments of a circle. We also like that you can attach photos, audio files, and Dropbox files to specific events.
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As one expects from a wallpaper app, the app is easy to use, with all the wallpapers appropriately structured in each category. Additionally, signing up on the application also syncs all the wallpapers over different devices. Of course, there are millions of wallpapers spread across different apps, but this one is definitely the best Android app for wallpapers. Android App
Despite the fact that we are well into the 21st century, paper still persists in offices. But Microsoft Office Lens lets you turn physical documents into digital ones using your Android. It can even capture doodles and notes from a whiteboard. If you want portable document scanning, but aren't keen on getting an Evernote account, this might be the solution for you.

We don’t typically recommend streaming services to people. Everyone has their preferences and saying that one is better than another is a matter of opinion at this point. Except for this collection of Android apps. There’s more content there than a human person can watch or listen to in several lifetimes. That includes music videos, educational videos, news videos, reviews, video game let’s plays, music (of course), and a whole lot more. YouTube Music should replace Google Play Music eventually. This collection is the best music and video streaming package on mobile as long as they remain tied together. Spotify, Apple Music, and Tidal are also great music streaming services, especially if you want better sounding music. 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.
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
Ever feel like there’s just too much news to keep up with? Nwsty might well be the app for you. It’s aimed at those who don’t often read the news, and makes it easy to keep up with the daily headlines without spending too much time on them. Each day, you get six to 10 headlines in your digest that you can quickly and easily read in a matter of only a few minutes.
Firefox is lickety-split fast and has a clean design that is a joy to use. Mozilla makes a big point about how it doesn't collect your data, and we are pleased to see that the app comes with a full complement of security settings—including an option to protect your information from advertisers and a private browsing mode. Like the desktop version, Firefox for mobile has a robust selection of plug-ins, excellent tab management, and a dynamic start page for bookmarks and the latest headlines. You can even sync settings, history, and tabs with the desktop variant Droid Apps

If an event isn't being organized on Facebook, it's probably being done through Eventbrite. This service makes it easy to manage invites, RSVPs, and even ticket purchasing. Attendees get handy reminders about the events they planned to attend, organizers can see guest lists. We particularly like that Eventbrite can generate QR codes, making event check-in a breeze. Droid App


Feedly takes the RSS feed into the modern age, and it's the easiest way to stay on top of all your favorites sources of news. You can view everything all at once if you want, but Feedly also lets you categorize your sources for focused reading or use its Today tab, which shows you the top stories from each category. Additionally, you can make Feedly look as simple as you wish, with minimalist text-only layouts. It's a great way to keep informed with the days' headlines and it offers useful integrations with other services as well. Droid App

You're terrible at passwords. Don't take it personally! Everyone is terrible at passwords. That's why we all need apps like Dashlane, which generate, save, and replay login credentials wherever they're needed. This smart, cross-platform service makes sure that your passwords, payment information, and other vital information is stored securely but never out of reach. New Droid Apps

Asana is the 800-pound gorilla of task management for teams, dwarfing other popular services like the capable Trello. Asana is all about workflows and checkbox tasks that can be assigned to individuals. The Android app lets you take your tasks on the go and offline, syncing your progress when you're back on the network. It's a powerful tool with an excellent interface, and new features are added regularly. Droid App
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