Android 

With the Cheezburger app, you can follow endless feeds of funny images, GIFs, videos and Remix them with your own pictures! Now only will you be introduced to funny people but funny memes will pop up on this app too. These cool and funny images can be saved on your device and shared with friends as well.
Ringdroid is an  open-source ringtone editor for Android which will allow you to create  personal ringtones, alarms, and notification sounds from existing music/audio files and record new ones using your device.
3. Sky Map
Google Sky Map will help you to explore the Universe using your Android phone. This app will allow you to  pinpoint the exact location of the stars, planets and other celestial objects in the night sky. All you have to do is oint your phone at the sky and you’ll see details of exactly what’s up there represented by a map in Google Sky Map.
Movies by Flixster a simple yet terrific app for learning about what movies are playing. It has many interesting tools as well such as media streaming and recent news, which are quite informative and engaging.
This app is might be one the best replacement for your traditional phonebook app. This app brings r contacts and communication apps together to one place, that’s accessible from all your screens. It’s almost as a new way to interact with your contacts.

 iOS

This is a very simple game but it can get pretty challenging at times. The goal s to eat as many fish the same size and smaller than you. The more fish you eat the bigger you will grow. The addictive factor is quite high on this one so, beware.
For video lovers, this ought to be a favorite. Horizon Camera simply eliminates portrait recording forever. The app has a rectangular indicator that always stays in the center of screen which makes it easy to click record videos.
Gruff Rhys’ American Interior is a story told across an app. The amazing story is told through 100 messages, including pieces of artwork, animations, prose, film clips and original music. It also features original words, audio, music and sound effects by Gruff Rhys.
4. Haze
Haze is one of the coolest and weather apps available. With this app, you can put some color on your forecast with Haze. Haze is build around the idea of giving you a radiantly crafted forecast at a glance. You can also, swipe through temperature, sunshine hours and rain chance or dive even deeper and get detailed information about the weather.
With Sleep Better, you can track your sleep, monitor your dreams, improve your bedtime habits and wake up better too! Sleep Better offers you a simple and engaging way to improve your sleep quality, whether you struggle to fall asleep, want to learn how your daytime activities influence your sleep efficiency or simply want some new alarm sounds to help you wake up.