Bulk WhatsApp Message Sender

I'm looking for a tool that can send bulk WhatsApp messages.using android The code should be straightforward, focused solely on sending the same text message to a large number of recipients.
and can also check if number is on whatsapp or no

NOT Requirements:
- Dont use whatsapp API
- using Accessibility Service

Key Requirements:
- android
- Ability to send the same text message to multiple recipients
- Ability to check multiple whatsapp number
- Simple interface with easy navigation.

Ideal Skills:
- Experience in WhatsAppAccessibilityService
- Experience in android developing
- Proficiency in WhatsApp UI.
- Strong understanding of text-only messaging protocols.
- Kotlin