Parent Teacher Online (PTO) is an Android application developed by CountryNet Software Pty Ltd. It is a free education and reference application that provides a secure platform for parents and teachers to book and view appointments for parent-teacher interviews. The app is widely used in Australia, the United Kingdom, and other countries.

The PTO app is user-friendly and allows parents to easily make and view their bookings from their phone or tablet. With this app, parents can save time and avoid the hassle of waiting in long queues to schedule appointments. The app also offers secure access to all the bookings, ensuring the privacy and security of the users.

The app is a great tool for teachers as well, as they can easily manage their appointments and avoid scheduling conflicts. The app also provides reminders to both parents and teachers, ensuring that they don't miss their appointments.

Overall, Parent Teacher Online (PTO) is a useful application that provides a convenient and secure platform for parents and teachers to schedule appointments for parent-teacher interviews.