Level Tool: Bubble & Slope

Level Tool turns your phone into a genuine spirit level and inclinometer. Hang a shelf, straighten a frame, balance an appliance or measure a ramp's grade without digging the toolbox out of the garage. TWO INSTRUMENTS, ONE APP A classic bubble vial for horizontal and vertical surfaces, and a digital inclinometer for ramps, roofs and stairs. The app switches between them based on how you're holding the device, so you don't hunt through modes. 0.1° RESOLUTION Angles are reported to a tenth of a degree. When a surface reaches true level, the vial turns green and a short haptic pulse confirms it — you can level a surface you can't see the screen of. FREEZE THE READING Bracing the phone somewhere awkward? Freeze the measurement and it holds on screen after you pull the device back. No more contorting to read a display wedged behind a washing machine. DEGREES, PERCENT AND RATIO The three units the trades actually use, shown simultaneously: degrees (°), grade (%) and run ratio (1:12). Checking an accessibility ramp against code takes one glance, not a calculator. PER-DEVICE CALIBRATION Every accelerometer carries a small bias. Rest the phone on a surface you know is flat, tap calibrate once, and the app learns your device's offset and corrects for it from then on. This is the difference between a novelty and a tool. NO INTERRUPTIONS No full-screen ads during measurement — a level that covers itself mid-reading is worse than no level. An optional one-time purchase removes ads entirely.