Bubble Level & Angle Meter

Bubble Level & Angle Meter is a calm, precise measuring tool for shelves, pictures, TV mounts, drains, roofs, furniture, caravans and RVs — with sound, vibration and voice feedback for when the screen is out of sight. WHY THIS ONE • Calibration that makes sense. A guided two-step flip measures on one spot, turns the phone around on the same spot and measures again. That cancels the camera bump, the case and the sensor's own offset — and the surface does not need to be level. • No ad ever sits on a measuring screen. The tool is never covered. • Works fully offline. No account, no sign-in, no analytics. • Honest precision. After calibration, phone sensors read to about 0.1°. A stability indicator shows when the reading has stopped moving, and the app never claims more precision than the sensor supports. LEVEL • Surface (bullseye), bar and plumb modes • Automatic mode switching from how you hold the phone, with manual lock • Reading in degrees, % grade, mm/m, in/ft, roof pitch x/12 or ratio 1:n — tap the number to switch • "Over" cell: how much higher one end is over a length you set • Hold and auto-hold freeze a reading you cannot see • Zero makes the current surface the reference • Tolerance from ±0.1° to ±1.0°, three smoothing levels • Keep the screen on while measuring ANGLE AND CLINOMETER • Full angle on any edge • Set zero, then measure relative to it — copy a stair rail or roof angle • Target angle with the guide tone as you approach it • A → B measures the angle between two surfaces • Roof pitch, complement and supplement at a glance CAMERA LEVEL AND SIGHT • Live level line and grid over the camera view for picture frames, shelves and doors • Sight mode reads the elevation angle to the top of a tree or building • With distance and eye height it works out the height of the target • A photo is saved only when you tap capture, with the angle stamped on it TOOLS FOR REAL JOBS • Slope check: drain 1–2 %, ramp 1:12, shower, patio, roof or a custom band, with too flat / too steep / pass • RV and caravan: which side to raise, by how much, and how many leveling blocks • Furniture and appliances: which foot to turn and by how much, with washer, fridge, table, pool table, aquarium, 3D printer and bed presets • Height finder, roof pitch, picture and TV • Calibration for flat and each edge, with one-tap reset EYES-FREE • Beep at level, or a guide tone whose beeps speed up as you get closer • Vibration pulses near level and a buzz when you are there • Optional voice readout of the angle every few seconds LOOK AND FEEL • Paper, Graphite and high-contrast Outdoor themes • Yellow, orange or mint accent • Big, readable numbers that work outdoors • Designed for phones and tablets, portrait and large-screen rotation • English for now; more languages are on the way PRIVACY • Sensor readings stay on your phone and are only held in memory while you measure • Camera frames are shown live and never recorded or sent • No analytics and no crash-reporting SDKs • The app uses Google AdMob for one banner on the Tools list, never on a measuring screen; AdMob may use the advertising ID, as the privacy policy explains • Besides that banner, the only network request is the feedback message you choose to send • Privacy policy: https://coolapphelpdesk-bot.github.io/bubble-level-privacy/ A phone is a useful level, not a certified instrument. For structural work that must meet a standard, check with a certified level. Questions or ideas: coolapphelpdesk@gmail.com