Version 3.0 — Major Update New N₂ Trailer Tube Plan tab — plan a job across all 16 trailer cylinders. Set each bottle's PSI, see which ones the job uses, and how much is left over. Linked or Independent Trailer mode — use the trailer planner with a pipeline test from the N₂ tab, or use it alone to answer "how much product is on board?" without running a test. Tests Remaining calculator — see how many more tests this trailer can complete before it needs a refill. Bottle status at a glance — color-coded rings and text labels (Available, Partial, Used, Empty, Low) across all 16 cylinders. Faster scenario modeling — preset fills, ±100/±500 PSI nudges, scenario buttons like Empty Top 4 and 50% Fill. Step-by-step calculation breakdown — see each bottle's contribution and how it raises the pipe pressure. Real-gas math across the full 0–8,500 PSI range, with recommended fill (6,500 PSI) and operating max (8,500 PSI) shown right on the cylinder grid. Plus iPhone 14 Pro Max layout fixes and dozens of polish improvements.

New: N₂ Trailer Tube Plan — plan a job across all 16 trailer cylinders, set each tank's pressure, and see which tanks get used and how much N₂ is left over. Plus improved nitrogen volume accuracy and a refreshed supply-options comparison.