Prat has not received updates for over 5 years.
While this is not a recommendation, here are
other software with similar functions:
Hourglass is a web-based app with mobile version for scheduling an reports.
Scheduler for meetings, public witnessing and more. Desktop app that uses the cloud, with a mobile version called JW Publisher.
A comprehensive tool for assisting with congregation organization, meeting scheduling, and record-keeping (with Linux version).
Kingdom Hall Schedules from Magestic Software is a tool for creating and managing schedules for congregations.