Yes, you can use SMS alerts with any version of Server Check.
SMS Credits can be purchased separately to a software license, and can be used in the free unregistered version, the free registered version and any of the paid versions.
You will receive a set amount of SMS Credits if you register or purchase a license for Server Check, and additional SMS Credits can be purchased here.
Yes, while a unique license is required for every installation of Server Check, your SMS API details can be used across as many installations of Server Check as you like.
Each SMS message will use one SMS credit from your SMS Credit Balance.
Server Check can send alerts to system administrators by SMS text so that they receive an instant notification whenever a service that is being monitored goes down. The system can also be configured to send recovery notices when services come back online and start responding to monitor checks after a period of downtime.
In order for Server Check to send these SMS alerts you will need to have SMS credits in your account, and you will need to insert the SMS API Key and SMS API Password into the SMS settings panel of Server Check. Each SMS message will use one SMS credit from your SMS Credit Balance.
Your SMS API details can be used across as many installations of Server Check as you like.