THIS APP REQUIRES ADDITIONAL HARDWARE.
This app interfaces with the recscan BT module.
Through this app you will be able to set the receiver frequency choosing from the commercial available 10 different bands.
However, you can define a custom band to set the frequencies you prefere, choosing from the allowed band limits.
The receiver, once set the frequency, replies with the signal strenght of the center frequency and the upper/lower neighbourhoods , default defined as central frequency plus/minus 25 Hz. It comes out clear that if you have a strong signal ONLY in the center frequency you are not affected by other Vtxs signals that can be close to.
Also, you can specify the neighbourhood limit, even if 25 MHz is ok you should for example set to 30 MHz to fly more 'safe'.
A band scanner is included, with the same goal, analyzing the center frequency and neighbourhoods to check if a channel is really 'free' or not.