John Williams

John Williams

Building tools I wish already existed
#101134400 followers0 following
☀️ 2 day streak
>10,000All time
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About

I fly a 1979 Mooney around the Pacific Northwest, where the weather is genuinely interesting and the terrain is unforgiving about it. That's most of the explanation for what I build. Aviation software on Android is thin; the good stuff assumes an iPad. So I started making the small, fast tools I kept expecting to exist and couldn't find, on the phone that's already in my pocket. Unicom is the first one out the door; a skew-T app is close behind. Twenty years in software, thirteen of them at Rover.com, these days leading an engineering team there. 42ndDesign is one person, and the list stays short on purpose, a few genuinely good things beat a catalog of mediocre ones.

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Maker History

  • Unicom
    UnicomEvery US airport, offline. Weather that shows its age.
    Aug 2026
    • 🎉
    Joined Product HuntAugust 8th, 2026

Forums

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20h ago

Unicom - Every US airport, offline. Weather that shows its age.

Aviation software on Android is thin; the good stuff assumes an iPad. Unicom is built for the phone already in your pocket. The complete FAA airport database ships inside the app, so frequencies, runways, and chart supplements work with no signal. Every frequency is grouped, labeled, and one tap from your clipboard. METARs and TAFs are decoded and always stamped with their age. Unicom never passes cached weather off as current. Free, no ads, optional tip.
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