This plugin hasn’t been updated in over 2 years. It may no longer be maintained or supported and may have compatibility issues when used with more recent versions of WordPress.

Formidable – Clockwork SMS


Adds an SMS box to your Formidable options pages, fill this in and you’ll
get a text message each time somebody fills out one of your forms.

You need a Clockwork SMS account and some Clockwork credit to use this plugin.



  • SMS settings in detail


  1. Upload the ‘formidable-sms’ directory to the ‘/wp-content/plugins/’ directory
  2. Activate the plugin through the ‘Plugins’ menu in WordPress
  3. Enter your Clockwork API key in the ‘Clockwork Options’ page under ‘Clockwork SMS’
  4. Set your SMS options for each Formidable Form


What is a Clockwork API key?

To send SMS you will need to sign up for a Clockwork SMS account
and purchase some SMS credit. When you sign up you’ll be given an API key.

Can I send to multiple mobile numbers?

Yes, separate each mobile number with a comma.

What format should the mobile number be in?

All mobile numbers should be entered in international format without a
leading + symbol or international dialing prefix.

For example a UK number should be entered 447123456789, and a Republic
of Ireland number would be entered 353870123456.

Contributors & Developers

“Formidable – Clockwork SMS” is open source software. The following people have contributed to this plugin.




  • Fix a couple of code standards warnings
  • Clarify license


  • WordPress 3.8 compatibility.


  • Added Clockwork “test” options


  • Initial release.