[SOLVED] How to Create a whats app SPYING app?

Tutorials & Methods
1

Can we create android apps for spying the phone.
like MSPY etc.
or
can we use kali linux for doing so?
please specify the method too.
Thankyou

2

https://cellphonetrackers.org/how-to-create-android-spy-app.html

http://www.nerdgrl.org/en/spy-app-hidden-camera-android/