RoboTone is an Android application developed by Robotani Technologies. It is designed to enhance the absolute listening skill of grade school students. The app aims to help users develop this skill before it becomes more challenging to acquire as they grow older.

The app provides a piano feature that allows users to play the piano and familiarize themselves with different tones. This helps in training their ears to recognize and differentiate between various musical tones.

Apart from the piano feature, RoboTone also offers a battle mode. Users can tap the battle button and participate in a musical battle with a robot opponent. In the battle, users are required to select the tones they hear and press the answer button to proceed. Correct answers decrease the robot's power, ultimately leading to victory.

Additionally, RoboTone allows users to customize their experience by tapping the settings button. Here, they can change the number of tones and select different instruments.

Overall, RoboTone is an engaging and educational application that helps users develop their absolute listening skill through interactive gameplay. It is an ideal tool for grade school students looking to strengthen their musical abilities.