1# Map category Traveling Adventure
Google map android app that i prefer from my own experience every one must use while moving around in new cites because it is quite help in such situation.
Comprehensive, accurate maps in 220 countries and territories
• Voice-guided GPS navigation for driving, biking, and walking
• Transit directions and maps for over 15,000 towns and cities
2# Snapseed category Photography
I long had a bit of a soft spot for Snapseed. Its intuitive interface was one of the most tactile on Android; moreover, the huge range of filters and effects made it perfect for all manner of photographic manipulation and fine-tuning. With 2015’s major revamp, Snapseed became further entrenched in must-have territory.
The star of the upgrade was Stacks, which converts each filter you apply into an editable layer. This means each effect can later be tweaked, rather than being burned into your image when applied, thereby providing even more scope for experimentation.
3# Gmail android app.
For email checking. if you have gmail account every mail is in your smart device.
4# Google drive android app.
For data back up you can try google drive do not want to store all of you data on you device i case of phone stolen of lost you can recover you data back.
5# G+ android app.
g+ is google social networking app just like facebook but less features but still quite interesting look .
6# google photos .
Is also a data back up android app for creating backup of your photos and videos that is stored on cloud and you can access them from any where in case of mobile phone lost or broken you can recover all of your photos