ZenLevel vs Precise Bubble Level

ZenLevel turns your iPhone into a precision inclinometer with the calm, deliberate feel of a real machinist's instrument. Built for builders, DIYers, photographers, woodworkers, and anyone who needs something perfectly level, perfectly plumb, or at exactly the right slope. FOUR MEASUREMENT MODES SURFACE — Lay your iPhone flat on a countertop, shelf, or picture frame. The two-axis bubble instrument shows the exact inclination, with digits that roll smoothly between values like a laboratory dial. When you find true level, the interface shifts to a calm, luminous green. PLUMB — Press the back of your iPhone against a vertical surface to check whether it is truly vertical. A tall bubble tube rises and falls with the wall's deviation, and a "check position" warning tells you when the phone is too flat for an accurate reading. CALIBRATE — Every sensor drifts. Place your phone on a surface you trust, wait for the stability meter, and tap ZERO OUT. Offsets persist across launches, and Reset calibration restores factory defaults at any time. HISTORY — Save any measurement to a log grouped by day. Tap an entry to see its details, edit its note, or delete it. HOLD THE READING Measuring under a shelf or behind a cabinet? Tap HOLD to freeze the reading, then take your iPhone out and read it — or save it — at your leisure. Tap RELEASE to go live again. SLOPE UNITS Show every reading in degrees, percent grade, millimetres per metre, or inches per foot. Rise-over-run units make drains, ramps, patios, decks, and gutters easy: a quarter inch per foot is simply 0.25 in/ft. Saved measurements follow your chosen unit and keep the original angle alongside. LANDSCAPE PRECISION MODE Rotate your iPhone to landscape and SURFACE becomes a long horizontal bubble vial for checking frames, shelf edges, and countertops along their length. A tipping indicator helps you keep the phone upright to avoid projection errors. DESIGN THAT FEELS LIKE A REAL TOOL • Deep blacks, subtle glass panels, and a signature zen-green accent • Rolling digit transitions on every live readout • Haptic feedback on level, save, calibration, and tab changes • Rotation-lock detection that guides you when iOS is locked to portrait • Decorative animations pause when Reduce Motion is on PRIVACY FIRST, BY DESIGN • No accounts, no login, no cloud sync • No tracking, no analytics, no advertising • No network requests of any kind • Measurements and calibration stay on your device • No third-party SDKs WHO IT'S FOR • Carpenters and builders checking walls, cabinets, and frames • Plumbers and landscapers setting drain and patio falls • DIY homeowners hanging shelves, pictures, TVs, and mirrors • Photographers aligning tripods and subjects • Woodworkers checking joinery and surfaces ZenLevel isn't a novelty. It's a precision instrument that lives in your pocket, ready to settle "is this level?" in seconds.

Get perfectly level results every time. Precise Bubble Level uses your iPhone's built-in sensors to deliver real-time, precise angle and tilt measurements — no internet required, no account needed. Whether you're hanging a picture frame, installing shelves, aligning furniture, or working on a construction project, Bubble Level gives you the accuracy of a professional tool right in your pocket. FEATURES - 4 Leveling Modes: Horizontal, Vertical, XY-Axis, and Auto mode that switches automatically as you rotate your device. - Real-Time Precision: Live angle readings update instantly as you move. - Calibrate & Lock: Calibrate to any surface and lock for hands-free measurements. - Save Readings: Store measurements for reference throughout your project. - Haptic & Sound Feedback: Feel and hear when you've hit a perfectly level position. - 100% Offline: No Wi-Fi, no account. Your data stays on your device. PERFECT FOR - Hanging picture frames and artwork - Installing shelves, cabinets, and furniture - Construction and carpentry work - Plumbing and pipe alignment - Photography and tripod setup - DIY home improvement projects - Tile and flooring installation PROFESSIONAL ACCURACY Bubble Level uses your device's gyroscope and accelerometer for high-confidence readings with near-zero margin of error. Calibrate once and trust every measurement that follows. SETTINGS YOUR WAY Choose your unit (degrees or percent), toggle haptic and sound feedback, switch between light and dark themes — Bubble Level adapts to how you work. Download Bubble Level and bring professional-grade leveling to every project. LEGAL Privacy Policy: https://ergunsu.com/apps/bubble-level/privacy/ Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/