Please follow the link below to get Arduino Example code and an illustrative User Manual (How to connect Arduino BT and some important configurations)
Androscope is an app which can communicate with your micro controlller (or Arduino) based circuit to trace and debug the circuit in real time
It can reach a sampling rate about 18000 Sample/Sec If you used a single channel
You can view multiple channels(signals) at once with different colors and names
You can save .png screenshots or export your readings as .m file to use in Matlab for further analysis.