The Write SMS by Voice app helps users to easily compose and send SMS messages by speaking them into the device. Simply speak and click the "Send" button to send your SMS message. No need to write down or save the message in your phone’s memory, as the Write SMS by Voice app will do that for you.

After you have finished recording, the Write SMS by Voice app will display the message and provide you with the option to send it immediately. Once you have saved the message, you can send it to any contact in your phone’s contact list.

There is also an option to get the response from Google’s speech recognition system. 

In order to get the best results, be sure to speak clearly and slowly.