Subject :ICSO Class : Class 5
Ans 1:
Class : Class 9
You can use Android Studio (or Eclipse) but you need to learn Java (or C or C++).
But Java, C, C++, etc. are very hard to learn so you can use Android App Inventor (ai2.appinventor.mit.edu/
) which is easier than Android Studio. (Just to know- Android Studio has more capabilities) Prajwal