WP SMS Pro Pack - WordPress and WooCommerce SMS Notification and OTP plugin, Integration with BuddyPress, GravityForms with Twilio, Plivo, Clickatell, Infobip, and Vonage Nexmo.

Advanced Send SMS Page
There are numerous options on this page for sending SMS. The Send SMS page lets you send SMS and MMS to subscribers, WordPress users, WordPress Roles, and special mobile numbers.

Scheduled & Repeating SMS
Advanced SMS Scheduling & Repeating options on the Send SMS page.

Send Flash SMS
To catch the recipient's attention immediately, you can send a flash SMS to them. A message appears on the recipient's mobile screen directly.

SMS Newsletter
A newsletter form that is displayed on the site then users can subscribe to the SMS newsletter, and you can send SMS to them.

Bitly Short URL
There is a feature that reverts some URL variables such as {order_url} to make the length of the message shorter. By enabling this option, all URLs are shortened by Bitly.

Manage Subscribers
You can manage newsletter subscribers and create groupings for them.

Outbox SMS Page
All SMS messages are stored in WP SMS, and you can have an archive of them. There is some option for re-sending, deleting and searching messages.