This release changes the App Store listing, not the app: Kerf is a one-time purchase, and the store page now says so up front. The app itself is unchanged from 1.0.3 — 20 verified calculators for concrete, stairs to IRC/IBC, roofing squares, pipe offsets and grade, rebar, aggregate, pavers, mortar, estimating and unit conversion. Every one shows its formula and the code or standard it cites. Offline, no account, no subscription. Also on Apple Watch: all 20 calculators, driven by the Digital Crown.

SEARCH AND METADATA Kerf Calc is now listed as a construction calculator, so the trades that need it can actually find it. WHAT'S INSIDE, UNCHANGED 20 verified calculators — concrete, stairs to IRC/IBC, roofing squares, pipe offsets and grade, rebar, aggregate, pavers, mortar, estimating and unit conversion. Every one shows its formula and the code or standard it cites. Offline, no account, no subscription. Also on Apple Watch: all 20 calculators, driven by the Digital Crown.

NEW — APPLE WATCH All 20 calculators on your wrist. Turn the Digital Crown, read the answer — no phone, no signal. • Framing — rafter cut length, stairs to IRC/IBC, right angle • Concrete — slabs, footings, rebar, aggregate, pavers • Takeoff — area and volume • Materials — roofing squares, drywall, compound miter, board feet, mortar • Pipe — offset, rolling offset, cut length, grade • Convert — feet-inch to metric Every wrist screen leads with the answer and runs the same verified maths as the phone. FIXED • Dimensioned tape maths now keeps its units across an intermediate "=". Reading 10' × 8' = 80 sq ft and then continuing × 4" now gives cubic feet, not another area.

NEW — PIPE LAYOUT • Offset — set, travel, run and the fitting multiplier for 45°, 22½°, 11¼° or any angle • Rolling Offset — true offset from set and roll, plus the angle to roll the fitting • Cut Length — centre-to-centre less your own take-outs • Grade — fall in inches per foot, percent, 1:N and degrees, checked against IPC/UPC minimums Every one shows its formula and the standard it cites, like the rest of the app. Still offline, still buy-once.