Arduino Pack 4+

All you need to work with Arduino.

Arduino Manager: The best app to remotely control Arduino boards and generate Arduino code. More than 30 different Widgets for every need (Switch,LED,Knob,Graph,Alarm,Threshold,Console,Accelerometer,Gyro,GPS,Twitter and many more). Connection through Bluetooth, Ethernet,WiFi. Requires additional hardware to connect to Arduino and not all Widgets are available for all the supported boards.

Arduino Meter: A precise voltmeter (based on an external voltage source which makes readings independent from the powering voltage) and a capacity meter. Requires HM-10 to communicate with the Arduino board.

Signal Generator: Controls the AD9833 to generate sinusoidal, triangular and squares waveforms. Requires a AD9833 breakout board to generate the signal and HM-10 to communicate with the Arduino board.

All the required hardware is widely available online and really cheap.