This App is specifically for use in conjunction with the NasaMarine Bluetooth LE Battery Monitor Device, and has no function without it. Bluetooth LE requires Android 4.3 or better. A description of its scope is contained within the manual for the associated hardware device. See www.nasamarine.com
This version 8 has an "Auto" function that recognises the custom name of your BM device for quicker connection, and a simple history that remembers data from the last 10 uses of the app.