This article describes how to use the speech-to-text functionality on your Android or iPhone to fill out comments and text feedback items.
To start the dictation, click on the textfield, this will prompt the keyboard on your device. Next, make sure that you have the correct language selected and then find the microphone icon on the keyboard. You can now dictate your comment or feedback.
On iOS you first need to make sure that dictation is enabled on your device. Settings > General > Keyboard, then turn on Enable Dictation.
Android keyboard can differ quite a lot, this instruction serves as an example.