IronWorker Pro is built by a structural ironworker at a fab shop near Puyallup, Washington. Every chart in the app is one that gets used on real work — the bolt tables, the rod specs, the rigging math.

That's the whole pitch: it was built because the builder needed it. If a feature doesn't help you on the deck or in the shop, it doesn't go in. If it does, it gets an animation so an apprentice can learn it in ten seconds instead of ten minutes.

Got a chart you wish it had? There's a feedback section right in the app — features get added because tradespeople ask.