01 · SCENARIOS
Seeded cellar & remodel scenarios
Duplicate 12+ first-launch projects—bulkhead cellar, steep remodel, loft ship-style sample, low-headroom problem case, metric twin—each with teaching notes and pass/fail bands.
Utilities · Offline workbench
Stair Geometry Desk
Turn a cellar opening and floor-to-floor height into riser counts, pitch options, stringer step-off marks, and a waste-aware cut list—offline, in one sitting, with teaching drills that catch unsafe layouts before you cut.
12+
Seeded teaching scenarios
100%
On-device SwiftData
Honest geometry before the first cut
Stair Geometry Desk is an offline Utilities workbench for DIY remodelers, cellar-access planners, and trade students who need honest stair geometry without scattering codebooks across the bench. Enter height, total run, opening width, target riser band, tread depth, and nosing; the app recomputes integer risers, exact rise and run, pitch angle, headroom envelope, and footprint live. Side-by-side Compare pins a steeper short-run against a gentler longer-run. Stringer mark lists, rough-cut material sheets, seeded bulkhead and low-headroom scenarios, and “spot the unsafe layout” drills ship on first launch. Local SwiftData only—no accounts, no cloud, no IAP. Export a multi-page educational stair sheet PDF with a fixed non-certification disclaimer on every page.
Illustrative marketing figures; not App Store metrics.
Workbench modules
Torch-lit tools · never a maze game02 · LIVE
Live geometry workspace
Set floor-to-floor height, run, width, riser band, tread, nosing, and in/mm units; instantly get integer riser count, exact rise, tread depth, pitch, and total footprint.
03 · HEADROOM
Headroom diagram & band charts
Inspect a side-view envelope with clearance callouts plus a rise-per-step chart so out-of-band pitches shout before lumber hits the saw.
04 · STRINGERS
Stringer marks & Compare A/B
Generate along-stringer step-off lists and square-cut refs; pin steeper vs gentler configs to see angle, footprint, headroom, and tread deltas on one screen.
05 · MATERIALS
Waste-aware rough-cut sheet
Build stringer, tread, riser, and optional handrail totals from active geometry with adjustable offcut factor and bundled board-length stock assumptions.
06 · DRILLS · PDF
Unsafe-layout drills & PDF export
Submit riser/tread calls on seeded drills, then unlock step-by-step rationales. Preview multi-page stair sheets—summary, diagram, marks, materials, disclaimer—for shop or class.
Built for the bench, not the cloud
Bright Chicken Road–inspired cartoon cellar chrome—torch orange, lantern gold, cream stone, slime green—with a torch-and-tunnel motif that stays warm and instructive. Projects stay on-device in SwiftData. Educational PDFs carry a fixed non-certification disclaimer on every page.
- iOS Utilities workbench
- PDF multi-page stair sheets
- No accounts · no IAP · no cloud on launch
- Teaching notes & unsafe-layout drills