
Free
About
Transform your iPhone into an ultra-precise dual-axis spirit level and angle inclinometer.
Whether you are hanging wall pictures, aligning furniture, leveling an RV camping vehicle, setting up a camera tripod, or checking construction slopes, this app delivers industrial-grade precision with tactile realism.
KEY FEATURES
Realistic Dual-Axis Physical Gauges
• Circular Bullseye Surface Level: 360-degree omnidirectional pitch and roll leveling for tables, shelves, countertops, and appliances with concentric degree guide rings.
• Fluid Spirit Vial: High-contrast tube with realistic physical bubble dynamics for edge alignment, plumb-line vertical checks, and woodwork.
Patented 180-Degree Reversal Zero-Drift Calibration
• Uneven phone cases, protective bumpers, or protruding camera bumps? No problem!
• Perform a quick 180-degree rotation on any flat surface: our reversal algorithm calculates and eliminates sensor drift and hardware bias instantly, revealing the true absolute level of the surface.
Automatic Seamless Edge Detection
• No manual switches needed! Hold your phone vertically for instant short-edge leveling. Turn it horizontally, and the app automatically switches to an ultra-wide landscape cockpit long-edge level.
Eyes-Free Acoustic Audio Guidance
• Level by sound without staring at your screen!
• Geiger Clicker: Pulse frequency accelerates as you get closer to 0.00 degrees.
• Pitch Glide: Smooth audio frequency glide indicating tilt direction.
• Crisp audio chime & gentle haptic pulse upon reaching perfect level. Includes an instant global mute button in the top bar.
Camera Live Inspector & Construction Watermark
• View live camera feed with an overlaid crosshair horizon line and 3x3 composition grid.
• Perfect for hanging large wall art, curtain rods, projection screens, and checking doors or windows.
• Capture photos with certified measurement watermarks including timestamp, tilt angle, GPS location, and inspector notes.
Professional Slope & Angle Units
• One-tap instant toggle between Degrees and Slope Percentage (%).
• Tare Zero (Relative Angle): Zero out any slope or incline to measure angles relative to an existing surface.
4 TAILORED SCENARIO PRESETS
Picture Hanging: Edge alignment with sensitive vibration and chime guidance.
Table & Furniture: Bullseye dual-axis surface leveling for 3D printers, stoves, and desks.
Photography: Live camera horizon alignment for landscapes and architectural shots.
RV & Outdoors: High-damping slope leveling for trailers, vans, and motorhomes.
PRIVACY FIRST & 100% OFFLINE
• 100% Offline: Inertial motion sensing calculations are performed purely on your device.
• Zero ads, zero trackers, and no mandatory in-app subscriptions.
• Does not collect personal data.
Precision in your pocket. Download now and level with confidence!
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What's New in Bubble Level
1.0
October 13, 2026




