MassSms

This app together with a companion software which you can download from http://sbss.com.sg/downloadMassSms.php would allows you to send thousands of SMS. Prepare your phone numbers, recipients names and their respective information, like membership numbers, expiry dates etc in an excel file. Then, using the companion software running on window notebook computer with bluetooth, you can compose individualised SMS to each number on the list. They can then be uploaded on your Android phone through bluetooth for sending using this app.

If any recipient reply 'unsub', 'un' or 'unsubscribe', you can update your list on your window notebook automatically.

This is suitable for clubs, associations, schools and even marketers who need to send SMS to each recipient for announcement, reminders or cancellation of meeting/classes or new products launches.
The free edition only allows sending of 30 SMS per session. If you subscribe to the premium subscription, the only limit is your phone's memory, which can contain tens of thousands of SMS, per session.