Released on April 30, 2009.
Added auto-rotation option.
Copy and Paste feature added in the web browser.
Increased speed and performance but not upto required level.
Released on September 15, 2009.
Voice search and Search box were added.
Faster OS boot times and fast web browsing experience.
Typing is quite slower
Released on October 26, 2009.
Bluetooth 2.1 support.
Improved typing speed on virtual keyboard, with smarter dictionary.
no Adobe flash media support.
Released on May 20, 2010.
Support for Adobe Flash 10.1
Improved Application launcher with better browser
No internet calling.
Released on December 6, 2010.
Updated User Interface with high efficiency and speed
One touch word selection and copy/paste.
New keyboard for faster word input.
More successful version of Android than previous versions.
not supports multi-core processors.
Released on February 22, 2011.
Support for multi-core processors
Ability to encrypt all user data.
This version of android is only available for tablets.
Released on November 14, 2011.
Virtual button in the UI.
A new typeface family for the UI, Roboto.
Ability to shut down apps that are using data in the background.
Released on June 27, 2012.
Latest version of Android.
Smoother user interface.
Its the most attractive feature, in this you are having voice search, send a text, play a song, search internet.
Multi tasking: Responds faster, touch is more accurate so that multiple things can also be done at a time like browsing the web, listening to music,
Android Lollipop has taken over from Android KitKat
64-bit system architecture
Design and visual changes
Performance and system features
Battery Power Optimization: Android N — improved battery life. Building along the same lines, we have the battery power optimization option which essentially means that an optimized app will cease eating battery juice when the phone is ideal.
Power Optimization: The options can be found under the battery settings. Though few apps like Facebook and Messenger continue to be huge guzzlers of battery juice, even when optimized.
Better Notification Control: So the new shopping app has been relentless in its display of discount coupons, right? While you can’t go ahead and ban the app (shopping is a therapy, remember?), this nifty little trick will take care of your hassles. The next time a notification arrives, long-press on it and tap on Block all notifications.
Data Saver: For the folks who haven’t been blessed with an infinite data plan, you can heave a sigh of relief.Nougat sports a built-in data saver feature which makes the apps use lesser data by limiting the background data usages.Furthermore, it also informs apps to use less data on the foreground as well. This doesn’t necessarily mean that apps will completely stop using data, but they will do so less frequently.
Arrange Quick Settings Menu : Agreed that the quick settings menu can turn out to be really helpful as it gets things done in a jiffy. Plus, it also lets you customize tiles as per your convenience. So if you don’t want the hotspot icon, you can easily swap it with a different one.
Enable Power Notifications: Nougat also comes packed with system UI tuner. Once it’s turned on, it opens a window of modifications. Among them, the power notification is quite a nifty feature. It lets you choose the priority of an app’s notification. The notification levels range from Level 1 through level 5, 5 being the most important.
Copy-Paste in a Jiffy in Split Screen : Perhaps one of the most awaited features of Android N was the split screen mode for multitasking activities like comparing documents or using one window for reference, while you type out an email. It can also be used to copy-paste text from one screen to the other or drag and drop items Copy-Paste Moreover, if you easily open a new Chrome window by dragging the already-opened window to the top. Once it’s settled there, tap on Move to other window under the three-dot menu.
Cat Collecting Game: Not necessarily a game in the true sense, if you ask me, I think it can be termed as a passive game which involves long hours of waiting for a cat to show up. Patience tester, perhaps?
Change the Display Size: It is sometimes quite a pain to peer into smaller fonts and displays. And the same holds true for the opposite as well, you wouldn’t want your messages to be visible to the whole world! So to set the DPI correctly, Nougat comes packed with a setting which lets you choose the size with which you’re most comfortable.
App Shortcuts : Popularly known as Pixel-like app shortcuts, this feature brings up the common options when you long-press on an app icon. For instance, a long press on YouTube would bring up the option for trending and subscriptions and a tap on it would take you directly to that page.
Pin Apps to Share Menu: The next time you peer into the share menu to find your favorite app, remember that Nougat has made things easier for you. All you have to do is pin the frequently used app at the top of the menu.
Enhanced File Explorer: Marshmallow gave us the much-need file explorer and Nougat has taken it to the next level, to the extent that you can do away with third party file explorers.
Mono Audio Playback : For those many of us folks, who listens to music with just a single ear-bud, Nougat has some good news for us. This feature will make the right and left audio channels to play parallelly in both the ear buds. So, don’t miss out on the perfect chance to experience a song in all its glory.
Emergency Info : Lock screens are meant to pose as a barrier for unauthorized access. But this important feature can pose as a road block if your phone gets lost and it lands in the hands of a good samaritan. Solution: Enable the Emergency Info in Settings
View Shortcuts with a Physical Keyboard : The last feature is for the tablet users. With the latest Nougat update in place, you will be able to have a quick glance on the keyboard shortcuts. All you have to do is press ALT+/ and the list will pop up. Some in-house apps have their own set of keyboard shortcuts. So the next time you connect a keyboard, be sure to try out this amazing feature.
The Alt-Tab of Android : Wondering about the strange heading? Just like the super handy functionality of Windows‘ Alt-Tab, Android has come up with a similar approach to switch between the recent apps. All you have to do is to double tap on the recent key and the next app on the menu will slide up neatly.
All you have to do is to double tap on the recent key and the next app on the menu will slide up neatly.
Bonus Feature: Night Mode: It’s a common belief that bright screens can wreck your sleeping habits