The mobile app (version 1.2.0+) allows you to easily share voice recording with clients. Tap the (+) button to the left of the chat text box and select the microphone from the options provided:
Tap Record to start your voice note. On Android, you may need to first accept permissions to record audio and store files on your device:
Once your recording is completed, either tap the play icon to listen to a recording of the note or tap Done to use the voice note.