There are many apps available for Android but these are some useful apps which I use regularly.
1. Money View: Financial Planning
Description: With the Free Money View app, you get a real-time visibility into your entire Personal Finances. It works by itself without any manual data entry - their daily expense manager app organizes our financial summary by analyzing SMS sent by our bank and billers to our phone. The app auto-tracks your expense, bills and account balances across all our financial accounts to help us stay on top of our money. The app is highly secure as it never reads any sensitive data - no full bank account numbers, no OTP, and no Netbanking login/password.
As it anaylzes the money transactions via the SMS in our phone it is highly useful app for tracking our expenses, so we can know our money is going in which direction so we can control it.
2. Any.do To-do List | Task List
Description: This app is usually task management app with lots of cool features. The main benefit is web, mobile, desktop and tablet support. You can create the notes with reminders which reminds you about every single task. Even when there is a miss call on your phone, it generates a pop up with the choices to call them instantly or remind you after 15 mins, 1 hour or later as per the time that you choose to be reminded. You can simply drag your tasks to do them today,tomorrow or someday as you wish. Every morning at 9:00 AM it reminds your tasks and plan your day.
So it as also a cool task management app to have which can increase your day-to-day productivity.
3. Inbox by Gmail
Description: Inbox, built by the Gmail team, keeps things organized and helps you get back to what matters. Get the most important information without even opening the message. Check-in for flights, see shipping information for purchases, and view photos from friends right up front.Similar messages are bundled together so you can deal with them all at once. And get rid of them with one swipe. More than mail, you can add Reminders so your inbox contains all the things you need to get back to. Snooze emails and Reminders to come back when you are ready to deal with them: next week, when you get home, or whenever you choose.
A really cool app by Google with lots of cools features.
4. MX player
Description - The best way to enjoy your movies. If you are a movie manic this is a must have app for you. Scrolling on the left and right side on your player increase and decreases the brightness and the volume respectively. MX Player is the first Android video player which supports multi-core decoding. Test result proved that dual-core device’s performance is up to 70% better than single-core devices.Easily zoom in and out by pinching and swiping across the screen. Zoom and Pan is also available by option.Scroll forward/backward to move to next/previous text, Up/down to move text up and down, Zoom in/out to change text size.
One of the best video players out there.
5. ES File Explorer File Manager
Description: Manage your files just like you do on your desktop or laptop using Multiple Select, Cut/Copy/Paste, Move, Create, Delete, Rename, Search, Share, Send, Hide, Create Shortcut, and Bookmark. All operations can be performed on local files (on your Android device) or even remotely (from your computer over a network). Categorize, uninstall, back up, and create shortcuts to your appsAllows you to compress and decompress ZIP files, unpack RAR files. Including photos, music, and videos; supports third-party applications such as Quick Office for better productivity.
A file manager with a really cool UI design, easy to access and elegant.