Offline First - Ham Radio Tools

Shaun Scholtz — Tue, 10 Nov 2026 14:42:15 +0000

Ham Radio Tools puts the amateur radio bench reference in your pocket, and it works completely offline. Buy it once, use it in the shack, at a portable site or on a mountain with no signal.

Antennas and feedlines
Dipole, vertical, loop, Yagi and beam planning, SWR and return loss, feedline loss, baluns and ununs, matching networks, VSWR charts and standing-wave plots.

Propagation and planning
Band plans (ITU, national and your own installed plans), shortwave broadcast schedules with an "on air now" view, greyline and beam headings, coordinates and distance.

Operating
UTC and world clocks with an ID reminder, a logbook with ADIF import and export, a Morse trainer, a CW sender and decoder (typed, tapped or from the microphone).

Electronics
Ohm's law, dB and power conversions, reactance and resonance, dividers, filters, component helpers and unit converters.

Noise hunting
QRM hunting checklist, source sketches, a harmonic finder and a DIY sniffer-loop guide.

Built for phones
Charts and illustrations resize and zoom to fit any screen.

Privacy first
No account, no ads, no analytics and no internet permission at all. Your logbook and settings stay on your device. The only permission is the microphone, used only if you choose to decode CW from the air.

DEV Community: Shaun Scholtz

Offline First - Ham Radio Tools