Prumo: Level & Inclinometer

Prumo turns your phone into a precision level. Rest it on a table and it becomes a bubble level; hold it against a wall and it becomes an inclinometer. The switch is automatic, based on how you hold the device — there is nothing to choose. WHAT IT DOES • Two-axis bubble level for horizontal surfaces • Inclinometer with angle in degrees for vertical surfaces • Automatic switching between both modes • Screen turns green and vibrates when level • Relative reference: zero out at any angle to copy it elsewhere, useful for aligning frames, shelves, and furniture • Calibration, to correct the sensor's factory misalignment • Portuguese, English, and Spanish GREEN MEANS TRULY LEVEL When you use the relative reference, the screen turns gold instead of green, and shows ALIGNED instead of LEVEL. These are different things: one tells you that you are on the true plane, the other tells you that you match the angle you set. Confusing the two leads to mistakes, so the app never leaves this ambiguous. REAL CALIBRATION No sensor comes perfectly aligned from the factory. If your device reads 0.4° on a counter you know is flat, it is the sensor, not the counter. Place it on a reference surface, tap Calibrate, and the offset is corrected on every reading from then on. NOTHING BETWEEN YOU AND THE TOOL Prumo asks for no permissions. It doesn't use the camera, internet, location, or storage. No ads, no purchases, no account to create, and it collects absolutely no data. It opens and works, even without a connection. It's free, and stays free. If it helps you and you'd like to support the maintenance and development of more free tools, there's a PIX key inside settings — entirely optional. WHAT IT'S FOR Hanging frames and shelves level. Checking whether a table, counter, or washing machine is flat. Measuring the slope of a ramp, roof, or pipe. Aligning furniture. Checking door frames and baseboards.