OmniCalc is your ultimate all-in-one offline calculator and unit converter app — a single utility toolbox for every precision calculation and unit conversion you need in daily life, work, or study. With 35+ free offline tools across three categories, OmniCalc replaces a drawer full of separate utility apps with one clean, fast, and completely private multi tool experience.

100% OFFLINE CALCULATOR — No internet connection is ever required. Every smart calculator and unit conversion tool runs entirely on your device. Your data never leaves your phone.

ZERO ADS — NO TRACKING — NO ANALYTICS
This privacy calculator contains no advertisements, no analytics SDKs, no crash reporters, and no third-party trackers. What you do in this offline tools app stays on your device.

★ FINANCIAL & MATH CALCULATORS
• Percentage Calculator — calculate discounts, markups, tips, and profit margins in seconds
• Loan / EMI Calculator — calculate monthly installments and interest rates for any loan
• ROI Calculator — return on investment financial calculator with clear breakdowns
• Tax & VAT Calculator — add or remove tax from any amount instantly
• Tip Splitter — split bills and calculate tips for any group size
• Discount Calculator — find the final price after any sale discount
• Salary Converter — hourly, daily, monthly, and annual salary calculator
• Profit Margin — calculate gross and net margins easily
• Compound Interest Calculator — visualize how money grows over time
• Fraction Calculator — add, subtract, multiply, and divide fractions
• Proportion Solver — solve math formulas like A/B = C/X in one tap

★ UNIVERSAL UNIT CONVERTERS
• Length Converter — km, m, cm, ft, in, mi, nautical miles
• Weight Converter — kg, lbs, oz, g, tonnes
• Area Converter — m², km², acres, hectares, land measurements (feddan)
• Temperature Converter — Celsius, Fahrenheit, Kelvin
• Volume Converter — liters, ml, gallons, cups, fluid oz
• Speed Converter — km/h, mph, m/s, knots
• Time Units — seconds, minutes, hours, days, weeks, years
• Data Size Converter — B, KB, MB, GB, TB, PB
• Pressure Converter — bar, PSI, atm, Pa
• Power Converter — watts, kilowatts, horsepower
• Energy Converter — joules, calories, kWh, BTU
• Angle Converter — degrees, radians, gradians
• Data Rate — Mbps, MB/s, Gbps
• Fuel Economy — MPG (US/UK), L/100 km

★ LIFESTYLE & PRODUCTIVITY TOOLS
• Age Calculator — exact years, months, and days from any birth date
• Password Generator — secure random passwords with custom rules offline
• Counter / Tasbeeh — multi-purpose click counter with lap support
• BMI Calculator — body mass index with health range guide
• Stopwatch — precision timer with lap recording
• Random Picker — decide randomly from a custom list
• Color Converter — HEX, RGB, HSL instant conversion tool
• Word & Character Count — live text counting for messages
• Roman Numeral Converter — numbers to Roman and back
• Water Intake Calculator — personalized daily hydration goal
• Shoe Size Converter — US, UK, EU, CM across men/women/kids

★ DESIGN & USABILITY FEATURES
• Beautiful dark-first UI with full light mode support
• Bento grid dashboard — see all utility tools at a glance
• Favorites — pin your most-used offline calculator for one-tap access
• Adjustable text size — small, normal, large, extra-large
• Haptic feedback for a satisfying tactile experience
• Backup & Restore — export and import your data locally

★ MULTILINGUAL SUPPORT
OmniCalc is fully localized in:
- English
- Português (Portugal)
- Português (Brasil)
- 中文 (简体) — Chinese Simplified
- العربية — Arabic

Switch language instantly from Settings with no restart required.

OmniCalc is a free calculator, offline tool, and built to respect your privacy. No sign-up. No cloud. No nonsense. Just tools that work.

Download OmniCalc today and simplify your daily calculations with the ultimate unit conversion and smart calculator app.