The OK / help / Text messages are limited to 200 in any yearly subscription to the basic service for $115US. $50US extra for the tracking function per year.
Email messages are unlimited according to the site but phone texts >200 cost an extra 10 cents $US each.
From the site:
*Unlimited Check-in/OK, Help, and Custom Message emails are included. Up to 200 annual Check-in/OK, Help, or Custom Message text messages to any mobile phone, worldwide, are also included in the plan. Your credit card on file will be charged $0.10 USD for each additional text message.
**Unlimited Check-in/OK and Help emails are included. Up to 200 annual Check-in/OK or Help text messages to any mobile phone, worldwide, are also included in the plan. Your credit card on file will be charged $0.10 USD for each additional text message.
Still cheap insurance
Mickp