Android app development

if you want to develop android app then goto\

1-APPMAKR

https://www.appmakr.com/

2-APPYPIE

http://www.appypie.com/android-app-builder

3-IBUILDAPP

http://ibuildapp.com/

4-APPGEYSER

http://www.appsgeyser.com/

5-UDACITY

https://www.udacity.com/course/android-development-for-beginners--ud837