A free program for Android, by Frederik Hauke.
The Arduino Bluetooth Terminal app for Android provides the easiest way to visualize sensor data from multiple Arduino sensors on your Android phone or tablet in real time. You can see values for up to 10 sensors at the same time. If you want to send data from your Android phone or tablet to Arduino, you can do so in real time.
You can change the settings for the Bluetooth module to connect to a specific device. In addition, you can also set the display to receive data from the Arduino.
