Tip: Click the brush to write in the Chinese character to define.
Click the >> to get more options including hearing the word.
iOS [after setup, hold the globe to change the keyboard input]
Android [after setup, hold the globe to change the keyboard input]
Download the Google Pinyin Keyboard - https://play.google.com/store/apps/details?id=com.google.android.inputmethod.pinyin
More notable iOS apps:
Strokes Order
Pinyin Helper