Smart Ruler: Tape & Caliper

Turn your smartphone into a clear, high-precision vernier caliper, dual-axis bubble level, 2D area calculator, and screen ruler tape! Smart Ruler eliminates the calibration flaws of traditional ruler apps by offering 1-touch physical calibration against standard reference cards or coins for dependable real-world precision. Designed with a refined, modern dark studio aesthetic and tactile micro-haptics, Smart Ruler delivers the fluid feel of mechanical measuring tools combined with digital sub-millimeter precision. KEY FEATURES & CAPABILITIES 📏 DUAL-CALIPER VERNIER PRECISION MODE • Measure small objects by placing them directly on your screen. • Dual independent calipers (Cyan & Amber) with 48dp ergonomic touch handles. • Sub-millimeter & fractional micro-nudge steppers (±0.1 mm / ±0.01 inch). • 1-Touch Screen Freeze Lock: Freeze calipers to record measurements without thumb slippage. • Zero-Reset button for instant relative differential measuring. 💳 1-TOUCH PHYSICAL CALIBRATION WIZARD • Standard credit cards (ISO/IEC 7810 ID-1: exactly 85.60 mm) allow instant 1-touch screen calibration. • Coin presets included: US Quarter (24.26 mm), 1 Euro (23.25 mm), 1 Rupee (21.93 mm), 100 Yen (22.60 mm). • Continuous fine-tuning scale slider (0.700x – 1.300x) with hardware display metrics baseline. 🟢 DUAL-AXIS BUBBLE LEVEL & INCLINOMETER • Digital bullseye spirit level for surface leveling and shelf alignment. • Real-time roll and pitch angle readouts powered by internal motion sensors. • Visual level lock indicator and haptic confirmation when surface is balanced. 🔲 2D AREA GRID & SURFACE CALCULATOR • Interactive 2D rectangular grid calipers. • Measures length, width, and surface area simultaneously. • Dynamic readouts in mm², cm², or square inches (in²). 🔄 VERSATILE MULTI-UNIT CONVERTER • Millimeters (mm) & Centimeters (cm) • Decimal Inches (in) • Precision Architectural Fractions (1/16" and 1/32" with simplified denominators) • Zero-jitter tabular figure numerals (tnum) for smooth real-time tracking. 🎨 3 CURATED THEMES • Dark Studio: Deep obsidian slate base with glowing cyan and amber accents. • Pitch Black AMOLED: True #000000 background for power saving and sharp contrast. • Crisp Minimalist Light: Clean, high-contrast surface with etched measurement ticks. 🌐 GLOBAL MULTI-LANGUAGE LOCALIZATION (16 LANGUAGES) Fully localized with 100% key parity across English, Spanish, German, French, Japanese, Arabic (with full RTL mirrored layout), Hindi, Portuguese, Simplified Chinese, Traditional Chinese, Russian, Korean, Italian, Indonesian, Turkish, and Vietnamese. 🔒 PRIVACY & INTEGRITY • 100% on-device measurement processing. • Zero personal tracking or unnecessary permissions. • Keeps screen awake while measuring so your work is never interrupted. Engineered with passion by Shuttle Technologies. Support: [email protected] Developer Apps: https://play.google.com/store/apps/developer?id=shuttletechnologies

Welcome to Smart Ruler: Tape & Caliper! • Precision 2D digital ruler with multi-touch calipers • 180° Angle Protractor with live camera overlay • Dual-axis bullseye surface spirit level • Accurate credit card, coin, and manual calibration • Area and perimeter measurement tools • 4 premium themes including Pitch Black AMOLED • Full offline support across 16 global languages