There is a button that you hold down and it sends a voice message (up to 60 seconds). They generally just send voice messages back and forth.

There is also a + for extra features like: * Sending a photo * Sending a short video * Calling * Money * Location

You don't need to be able to read to use any of them.

In countries and regions where Chinese is spoken, people heavily use the voice message functionality.

same way toddlers install apps: voice and voice to text input.

also in china older generations migth be literate but not capable of typing in a phone/computer.