RF Wi-Fi Mapper: Heatmap

RF Wi-Fi Mapper turns an Android phone into an indoor site survey tool. You load a floor plan, walk the building and tap to record real Wi-Fi or LTE and 5G readings where you stand, and a heatmap interpolated from those points shows strong and dead zones on one consistent colour scale. Readings come from the phone's own radio hardware, and nothing is simulated.

It also shows what else is on the air: every network in range with band, channel, width and security, how busy each channel really is, weighted by neighbours' signal, and a channel recommendation, or an honest note that nothing nearby is quieter. Stability charts tell a dropping link from a weak one, and you can hand clients a PDF report. A phone is not a calibrated survey instrument, but for installers, IT staff and curious home users it is remarkably capable.