QT-net 駐車場ツール is a free Android app developed by 株式会社アイテック. It allows users to conveniently pay for parking fees at QT-net affiliated coin parking lots using their smartphones. To use the app, users need to register for the QT-net Point Club and link their credit cards. With the app, users can pay for parking without having to go to the payment machine by scanning the barcode displayed on the app with a barcode reader equipped payment machine. The app also offers features such as reserving vacant parking spaces, searching for parking lots using GPS, displaying the payment history of previously paid parking, showing parking lot occupancy information, registering as a new QT-net member, and updating QT-net membership information. The app is compatible with various smartphone models from different carriers, ensuring a wide range of users can benefit from its features.