***Important***
Please follow the link below to get Arduino Example code and an illustrative User Manual (How to connect Arduino BT and some important configurations)
https://goo.gl/hjVSvM

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.