ArduinoBlue is a free iPhone app developed by Mechanismic Inc. It allows users to control Arduino microcontroller connected devices over Bluetooth. With this app, users can easily interface with their Arduino using sliders, buttons, a joystick, and even tilt control.

One of the standout features of ArduinoBlue is its easy-to-use Arduino library. This library enables seamless integration between the app and the Arduino, making it a breeze to control various components such as motors, servos, and sensors connected to the microcontroller. The app also supports custom sliders and buttons, allowing users to add as many as they need to suit their specific project requirements.

In addition to the intuitive control options, ArduinoBlue also offers the ability to send and receive string text. This feature can be particularly useful for projects that require communication between the app and the Arduino. Whether you're a beginner or an experienced Arduino enthusiast, ArduinoBlue provides a user-friendly interface to interact with your devices.

Please note that ArduinoBlue is only compatible with iOS devices that have Bluetooth Low Energy (BLE) modules, such as the HM10 Bluetooth module.