Prefix App vs Offline Unit Converter

Prefix App is the App that let you put a prefix before the phone number without editing your address book. Very useful if you have a business phone. Features: - Full address book - Customizable address book - Recent calls - Customizable prefix; - Customizable suffix; - Direct call with phone keypad; - Simple, intuitive and smart interface;

Unlock a unified, minimal, and lightning-fast conversion experience. Unit Converter Offline is designed from the ground up for speed, simplicity, and complete privacy. No ads, no trackers, and absolutely no internet connection required. Whether you are studying, editing documents, coding, or computing complex physics measurements, get instant results with a premium, uncluttered interface. *** WHAT MAKES US UNIQUE *** • 100% OFFLINE & PRIVACY-FIRST No account registration. No data collection. No network calls. All calculations and history items are kept entirely local to your device. • SMART EXPRESSION EVALUATOR & LIVE SEARCH Type directly to convert. Simply type "100 kg to lbs" or evaluate mathematical formulas like "12 * (4.5 + 1.5) inches to cm" directly from the main search bar. • CREATE CUSTOM UNITS Can’t find a niche unit? Build your own custom categories, reference bases, and scale factors. Manage them anytime from settings. • COMPREHENSIVE SCIENTIFIC & GENERAL METRICS Wide-ranging support for physics, electrical, engineering, and digital measurements, including pressure, energy, density, volumetric flow, radiation, and data rates. • RESPONSIVE DESIGN FOR IPHONE & IPAD Enjoy a layout optimized for any viewport. Features a dual-pane sidebar converter layout on iPad for massive productivity. • POWERFUL SHARING & UTILITIES Copy output formulas to your clipboard, or export full conversion graphics directly as text, clean PDFs, or beautiful cards to share with friends or colleagues. • ADDITIONAL EVERYDAY LIFESTYLE MAPPINGS Quick access to cooking measurements, clothing systems, hat sizing, ring sizes, and gold purity ratios for convenient day-to-day shopping and baking. *** 31 BUILT-IN CATEGORIES *** 1. Length (meters, inches, feet, yards, miles, light years) 2. Weight & Mass (grams, kilograms, pounds, ounces, stones) 3. Temperature (Celsius, Fahrenheit, Kelvin) 4. Area (square meters, acres, hectares, square miles) 5. Volume (liters, milliliters, gallons, quarts, cups) 6. Speed (m/s, km/h, mph, knots, Mach) 7. Time (milliseconds to years) 8. Digital Storage (Bytes, Kilobytes, Megabytes, Gigabytes, Terabytes) 9. Pressure (Pascal, Bar, psi, atmosphere) 10. Energy (Joules, Calories, Kilowatt-hours, BTU) 11. Power (Watts, Horsepower) 12. Angle (Degrees, Radians, Gradians) 13. Fuel Economy (mpg, L/100km) 14. Frequency (Hertz, Kilohertz, Megahertz) 15. Force (Newtons, Pound-force) 16. Data Transfer Rate (bps, Mbps, Gbps) 17. Density (g/cm³, kg/m³, lb/ft³) 18. Torque (Newton-meters, Pound-feet) 19. Electric Current (Amperes, Milliamperes) 20. Illuminance (Lux, Foot-candles) 21. Volumetric Flow (L/min, gal/min, m³/h) 22. Electric Charge (Coulombs, Ampere-hours) 23. Radiation & Radioactivity (Sieverts, Grays, Becquerels) 24. Shoe Size (US Men/Women, UK, EU shoe sizes) 25. Ring Size (Inside Diameter, US, EU, JP, CN sizes) 26. Blood Glucose (mmol/L, mg/dL) 27. Typography (Point, CSS Pixel, Inch, Millimeter, Pica) 28. Hat Size (Inches, Centimeters, US, UK sizes) 29. Cooking & Baking (Cup, Metric Cup, Tablespoons, Teaspoons, Pinch, Dash) 30. Clothing Size (US, UK, Europe, France, Italy, Japan dresses) 31. Gold Purity (Karat, Fineness ppt, Percentage %) Plus, add infinitely many custom categories! *** USER EXPERIENCE DETAILS *** • Starred Favorites carousel for quick access to your most-used pairs. • Dynamic search history with instant undo options. • Customizable precision (decimal formatting and scientific notations). • Segmented appearance picker to toggle Light, Dark, or System mode. • Full system haptic feedback.