Clinometer+ turns your iPhone into a slope, angle and roof pitch meter. Open the app and the live angle is already on screen — lay the phone on a rafter, a ramp or a deck board and read it in degrees, percent grade and 1:N ratio at the same time.
▶ FOUR WAYS TO READ AN ANGLE
• Auto — round gauge with degrees, grade % and ratio, plus a live row for x:12 pitch and mm per metre.
• Roof Pitch — rise:run (4:12, 6:12…) with the nearest standard pitch from 1:12 to 12:12.
• Slope — grade % with walking categories and references such as the ADA ramp limit (1:12) and a safe ladder angle (75°).
• Tilt — bubble view with ± degrees and a clear level indicator.
▶ HOLD IT ANY WAY
Lying flat on a surface, standing on its end, or on its long edge against a stud — the app detects how the phone is held and shows it. If it guessed wrong, tap the chip to switch. Uphill and downhill are told apart.…
From the developer’s store description.