Our development team challenge themselves constantly to add new functionality, meaning that comparing last year's PRTG to the current version is like comparing an Apple iPhone 3 to iPhone 6. Just in the last 12 months, we have enhanced our mobile apps with free push notifications, added additional responsiveness to the web GUI, and added new sensor types like, for example, the Cloud HTTP sensor. You can find the full list of new features and sensors is on this webpage.