Johnston Software & Services LLC

We build focused, well-crafted mobile applications. Based in Portland, Oregon, Johnston Software & Services is a small software studio that believes the best apps do one thing really well.

Our Apps

SkyWave - HF Radio Propagation

SkyWave gives amateur radio operators a clear, opinionated answer to the question every ham asks before getting on the air: "Which band should I use right now?"

Instead of presenting walls of raw solar data, SkyWave evaluates real-time conditions from NOAA Space Weather Prediction Center and KC2G ionospheric data, then delivers a single recommendation you can act on.

Features:

  • Real-time band recommendations based on solar flux, K-index, MUF, and geomagnetic conditions

  • Space weather monitoring with visual gauges and trend charts

  • Grey line detection with interactive 3D globe

  • Long path propagation analysis

  • NVIS evaluation for regional communication

  • Situational alerts for rare openings, sporadic E, and geomagnetic storms

  • Save multiple locations and compare propagation across them

  • Share your conditions with other operators

Available on iOS and Android.

About Us

Johnston Software & Services LLC is a registered Oregon limited liability company founded in 2026. We are independently owned and operated by Phil Johnston, a licensed amateur radio operator and software developer.

Our development philosophy is straightforward: build tools that solve real problems for real people. Every feature ships because it earned its place, not because a checklist demanded it.

Screenshot of the Skywave App