SMS messages can be sent automatically through Job Types and Automated Assistants, Quotes and Invoices as well as through a Form Submission. You can easily Making Calls and sending an SMS to Clients through the App too.
The SMS feature will charge the account details that we have for your monthly User charges.
To add SMS credit, Web Portal > Settings cog > Email & SMS > SMS account. You can purchase credits and also set up an automatic top up option.