There are many apps are available in Google play store over 1 million apps, but their are must have app in daily life I am going to tell which are the most essential android app on your android
Today lot of free apps offering Android
platform i am going to tell
must have and essential have apps in android Smartphone
Airdroid:
this is the must must have app in android Smartphone This app only offering in
android operating system, this app is allowed user can sent files , take
photos, calls, playing music (etc) AirDroid is a free and fast app that helps
you manage your Android from a desk web browser, all over the air. The web
desktop looks a lot like it always has, but that doesn't mean it's the same.
The new Toolbox widget on the right side condenses some of the more useful
tools: file upload, non-Market APK installs, clipboard sharing, and URL forwarding.
The remote login feature enables another useful tool: location. AirDroid can
access your phone or tablet's GPS radio to get a pinpoint location. It takes a
minute, but it's just as accurate as Google Maps, which AirDroid uses to
display the location. Obviously this isn't all that necessary when you've got
your device handy, but if you lose it,
Android device Tools includes a quick link to
the Tethering menu, for those who want to access their device while using it as
a WiFi hotspot or tethered access point , AirDroid remains the best app of its
kind for remote access
Barnacle Wi-Fi Tether:
this is the best example of hotspot. user can allowed hotspot in your Android
Smartphone , we can connect many Smartphone, laptops, PC, and other Wi-Fi
capable device I think it is the only app have no defect on your Smartphone But
this app required Root without Root access this app can't work , i recommended
this app who want to connect many device with Wi-Fi hot spot , it is fastest
hotspot is all-time in android platform Turn your phone into a Wireless
Ad-hoc Hotspot Share your 3G with Windows, Mac/iPod/iPad, Linux, Xbox Requires
__ROOT__ access Barnacle is unlimited, free and open source, Android Smartphone
turn into a Powerful Wi-Fi Hotspot 
MX Player: this payer must have app in
android Smartphone forever. The MX Video
Player also lets you pinch-and-zoom your video size, which I think is a
brilliant feature as there have been countless times when the default sizes for
a video have been few and far between. This handy little feature gives you 100%
control of how big, clear or pixilated you want your video to be. Last but not
least, the picture quality is superb and everything in the app is quick and
responsive to the touch. the whole idea behind the MX Video Player is that it
puts you in control. Presets become a thing of the past, and if you ask me,
that's a good thing. That you could throw almost any video file at it without
having to bother with codecs and trans-coding on the PC, is the clincher.
Evernote: Evernote seamlessly
syncs your notes, images, and voice recordings via the cloud, giving you access
from all your devices, If you're looking for a full-featured note-taking app
that syncs across all platforms -- or just an easy way to keep track of your
digital odds and ends -- Evernote is the best I've seen for Android. With
Evernote, you can keep track of anything and everything you can think of,
including speeches, drawings, locations, design ideas, songs, and, yes, even
grocery lists.
One of Evernote's greatest strengths is
that it can seamlessly sync all of your notes and "notebooks"
(collections of notes) via the cloud. This allows you to access your notes from
virtually any device that has a data connection
Wi-Fi Finder: Thanks to JiWire Inc. they make
this Amazing app. Must have app in
Android Smartphone all-time this app allowed user can easily find Wi-Fi network
where available this app have very nice interface, click the Scan button and
Wi-Fi Finder will display all of you local hotspots on an aesthetically
pleasing and easy to digest map, this app lets you scan for hotspots around you
and you can filter either by free or paid options, venue type (cafes, hotels
etc) or by service provider.
Using the app is easy and quick to
master. Everything you need like the inbuilt Wi-Fi scanner, Public Wi-Fi Near
Me search tool is on the home screen is easy to find and operate. All in all
it's a thoroughly good app . Strongly I recommended to download this app
Pocket:
Must have app in Android Device This app allowed Users to save Webpage, Web
articles, Video (etc) app formerly known as Read It Later, is a
lightweight utility that lets you save Web content for offline consumption on a
variety of devices, With help of this app we ca easily save article or save
video from online and see offline This app is so good I recommended this app
for all of you 
1mobileMarket:
it is best alternate of Play store this Super apps market allowed download and
save APK and install just like play store 1MobileMarket have So many apps .
1Mobile Market is the one of the most powerful app stores on android, which
provides you bunch of rich features and facilities; you can download any apps
or games from it. you don't need to take a backup of the apps or games which
you downloaded from 1mobile market because it already save APK file on your SD
card which you download from it.
Photo Gird:
It is also Must have app in android device This app we can easily create
collages So many People are using This app. Photo Grid is
free and makes sharing pics and collages easy. Instantly and easily create
collages, wallpaper and photo albums. Edit pictures in our photo lab and share
on Instagram , Facebook, Twitter and other places with Photo Grid. This collage
maker is incredibly easy to use, try it and see for yourself. 100% free and
fully loaded, Photo Grid is an incredibly simple app for creating good-looking
collages from your images
If you not Download these app I listed above
it is Big miss Download now on Google Play Store Happy Downloading