Schedule Messages to be sent later on whats app,
You can do with with an app “Whatsapp message scheduler lite”
this app will let you customize a sending frequency for a message
download this tool here
– Auto Complete Whatsapp Contact(s)
– Send Whatsapp Message to multiple contacts.
– Date and time choosen to send.
– Alert on delivery.
note:-Your phone must be rooted to use this tool