Android WhatsApp & SMS Trigger Button

I already have WhatsApp messaging fully configured on the web portal and everything works there. What is missing is the same convenience inside the Android app: a single button that, when tapped, fires both a WhatsApp message and a standard SMS... (Budget: ₹12500 - ₹37500 INR, Jobs: Android, Android App Development, Android SDK, API Development, Backend Development, Java, Mobile App Development, PHP)