After 4 years, iOS developers can now interact with WhatsApp via URL Schema

In their latest release, WhatsApp has introduced their app URL schema.

For example, the following URL will open WhatsApp from your app, with the message and user prefilled.

whatsapp://send?text=Hello%2C%20World!&abid=1234

At the same time, the app has changed from fixed paid app to auto-renewable subscription. So they earn $0.99 every year!

Interestingly, didn't Apple say auto-renewable subscription is only for apps that has new content?