Heartbeat are basically a signal that your Android phone sends to Hypersender to let it know that it's still alive and connected to the internet. This is important because Hypersender needs to know if your phone is still connected to the internet to send and receive SMS messages.
If you are curious about how Hypersender SMS works, you are in the right place. This section will give you a brief overview of sending an API request triggers your phone to send an SMS message.
Explore the Hypersender API documentation to learn how to send messages to your customers via WhatsApp and SMS.
When someone sends an SMS message to your phone number that is connected to Hypersender, Hypersender will forward the message to your specified webhook URL. This allows you to receive SMS messages from your customers and respond to them programmatically.