fix some errors in readme file
@@ -12,14 +12,14 @@ platforms, notably mobile ones, in Python.
![Deploy to PyPI](https://github.com/kivy/plyer/workflows/Deploy%20to%20PyPI/badge.svg)
-## How
+## How plyer works?
Plyer tries not to reinvent the wheel, and will call for external libraries to
implement the api in the easiest way, depending on the current platform.
-- on python-for-android, pyjnius is used
-- on kivy-ios, pyobjus is used
-- on windows/mac/linux, commonly found libraries and programs will be used
+- On Android(python-for-android), pyjnius is used
+- On iOS(kivy-ios), pyobjus is used
+- On windows/mac/linux, commonly found libraries and programs will be used
## Supported APIs
