LevelFox: Level, Ruler & Angle

LevelFox is 4 essential measuring tools combined into one clean, responsive app: bubble level (spirit level), angle meter (inclinometer), on-screen ruler, and protractor. Calibrate all 6 sides with ease, measure accurately, and enjoy a tool with zero forced ads and zero invasive permissions. WHY LEVELFOX • True Accuracy: Smoothed gravity sensor readings displayed with 0.1° resolution. • 6-Side Calibration: Calibrate all 6 faces of your phone (flat, face down, and every edge) using a simple 180° rotation technique — no certified flat surface required. • Works Any Way Up: The bubble follows the phone in portrait and landscape, on any of its 6 sides. • No Annoyances: No intrusive full-screen interstitials, no forced review popups, no mandatory subscriptions. Just one small banner at the bottom that hides during ruler and protractor measurements. Go Pro once to eliminate ads permanently. 4 TOOLS IN ONE APP 1. Surface Level (Bull's-Eye): Circular bubble with concentric degree rings (1°, 2°, 5°) and dual X/Y angle readings for tabletop leveling, appliances, and flat surfaces. 2. Edge Level (Tubular Bubble): Smooth tube bubble automatically matching the resting edge (bottom, top, left, right). Perfect for hanging picture frames, shelves, and cabinets. 3. Angle Meter (Inclinometer): Large, bold digital readout with circular angle gauge. Supports degrees (°), slope percentage (%), mm/m, and in/ft (rise/run). Includes relative zero to measure angles between two surfaces. 4. On-Screen Ruler & Protractor: • Caliper Ruler: Precision vertical ruler in centimeters and inches with dual draggable calipers. Calibrate with any standard credit card, ID card (85.60 mm), or coin for 100% physical accuracy. • On-Screen Protractor: 0–180° protractor with two draggable rays and angle snapping (0°, 15°, 30°, 45°, 90°). Measure small physical objects placed directly on screen. • Edge Angle: Press your phone edge against any surface, pipe, or lumber to read its exact tilt without opening the camera. KEY FEATURES • Haptic confirmation and optional audio tone when level is reached • HOLD button to freeze readings in hard-to-see spaces • Relative Zero mode ("REL") for angle differences • True Black OLED dark theme (#000000) for battery saving and readability • 100% Offline: Zero dangerous permissions required PERFECT FOR • DIY home improvement & carpentry • Hanging picture frames, wall art, and shelves • Aligning tables, washing machines, and RV campers • Drawing, homework, and woodworking angle measurements • Measuring small parts and hardware NOTE Readings rely on your phone's built-in motion sensors. Precision depends on hardware, phone case, and calibration. For safety-critical construction, always verify with a certified physical spirit level. Part of the Fox app family by DangNH Studio.