Ham radio operator OK1CDJ/SV0SYH.

You can support creating ham radio apps:

FT8Web - Amateur Radio FT8 client running entirely in the browser.

WSPR lab - WSPR Antenna Lab is a specialized tool for radio amateurs to compare the real-world performance of two antennas. By leveraging global WSPR data, it provides objective metrics on gain, signal coverage, and propagation efficiency.

DX Radar - DX Radar is a real-time dashboard for radio amateurs to track active DX expeditions and manual callsigns. It integrates live spots from DX Cluster and RBN with your Club Log data to show what you've worked and what you still need.

Trainer - Ham Radio Phonetic Training Utility.

VHF Sim - VHF Contest simulator.