NanoVNA WebApp is an open-source Android application developed by cho45 for NanoVNA and NanoVNA-H. This small standalone VNA (Vector Network Analyzer) works by connecting with NanoVNA via USB. The app allows for an increase in measurement points with multi-segment scan, screen capture of NanoVNA, s1p and s2p file generation, and time domain measurement.

To connect NanoVNA to an Android smartphone, a USB OTG cable connector is required. NanoVNA WebApp is an excellent utility tool for those who require a VNA on-the-go. The app is free to use and provides accurate and relevant information for those who work with RF circuits and antennas. Overall, NanoVNA WebApp is a great addition to the tools available for RF enthusiasts and professionals alike.