I intend to build software for small businesses for accounting and inventory management. Is it possible to make the app send WhatsApp notifications to each customer to keep them informed about their accounting operation like invoices and payments and remind them about their due balance?
We use workflows and automation to trigger webhooks to services like WhatsApp. So, for example, a new record is created in Module X, which triggers (via an afterCreate workflow trigger) a webhook to send a message to a contact record from Module Y.
You could create a simple sub-workflow that fires your WhatsApp webhook, and that sub-workflow can be embedded in multiple other workflows.
In a workflow, you would use a function of type HTTP request for the webhook.
I hope this helps.