Bubble Level – Ruler & Laser

Turn your phone into a precision bubble level, ruler and laser level — no toolbox required. Bubble Level reads your device's motion sensors and shows three spirit levels at once: a horizontal tube, a vertical vial and a circular bullseye. Lay your phone on any surface and the bubble turns green the moment it's level, red the moment it isn't. Live X and Y angles are shown in degrees or percent slope. Whether you're hanging a picture, mounting a TV, fitting a shelf, checking a washing machine or laying tile, it's the same tool a carpenter keeps in their pocket — already in yours. ★ THREE LEVELS, ONE SCREEN - Horizontal tube level for left–right tilt - Vertical vial for front–back tilt - Circular bullseye level for both axes at once - Bubble turns green when level, red when off - Live angle readout in degrees (°) or percent slope (%) - One-tap calibration for a perfectly flat reference ★ RULER - On-screen ruler with scales on both edges - Centimetres or inches - Calibrate against a bank card so measurements match real life - Great for quick measurements when no tape measure is around ★ LASER LEVEL - Projects a true horizon line over your camera view - Line stays level with gravity as you tilt the phone - Green when aligned, red when off - Read slope as a percentage grade ★ NOTES & TASKS - Save measurements with the job they belong to - Simple notes and a checklist, built right in - Everything stays on your device ★ MADE YOUR WAY - Deep Blue and Vibrant Yellow themes - Degrees or percent slope - Keep the screen on while you work - Built-in flashlight for dark corners - Available in 10 languages ★ ACCURATE BY DESIGN Bubble Level uses your phone's fused rotation sensor — the same one games and navigation apps rely on — and smooths the signal so the bubble settles instead of jittering. Calibration lets you cancel out any tilt in your device's own sensors, so a surface you know is flat reads as flat. Note: your phone's case, a raised camera bump or a warped screen protector can hold the device off the surface. For best results, calibrate on a surface you trust. ★ PREMIUM Free version includes the bubble level and ruler. Premium adds: - Laser level - Keep the screen on - Ad-free experience - Vibrant Yellow theme Choose a subscription or a one-time lifetime unlock. Prices, billing period and renewal terms are shown before you buy, and subscriptions can be cancelled anytime in Google Play. You can also unlock a premium feature for 24 hours by watching a short video. ★ PERMISSIONS - Camera — used only to show the live view behind the laser level line. No photos or video are taken, stored or uploaded. - We do not collect your measurements. Your notes and tasks stay on your device. Whether you're a carpenter, electrician, tiler, DIY enthusiast or just hanging a shelf straight, Bubble Level gives you a fast, reliable spirit level whenever you need one. Download Bubble Level and get it right the first time.