Calculator – Fast & Simple

Calculator – Fast & Simple | All-in-One Calculator App

The fastest, smartest free calculator app for Android. Built for students, professionals, shoppers, and everyday users — scientific calculations, AI math solving, live currency conversion, unit conversion, date math, discount and tip calculations, plus a floating calculator that works on top of any other app. No subscriptions. Works offline. Opens instantly.

🖥️ FLOATING CALCULATOR – USE WHILE IN ANY OTHER APP
The only calculator with a true floating overlay window. Launch it and it appears on top of your browser, email, shopping app, or notes — whatever you're using. Drag anywhere on screen. Resize from four corner handles (220×280 up to 400×520 dp). Adjust transparency from 30% to 100% so it never blocks your screen. Minimize to a small app bubble with one tap — tap again to expand. Your expression stays exactly where you left it.

🤖 AI MATH SOLVER – STEP-BY-STEP SOLUTIONS INSTANTLY
Type any math problem and get a full step-by-step solution in seconds. Handles algebra, calculus, geometry, trigonometry, quadratic equations, logarithmic and exponential problems, fractions, and word problems. Perfect for students who need to understand the method, not just the answer — and for professionals who need quick verification.

🔬 SCIENTIFIC CALCULATOR – COMPLETE FUNCTION SET
▸ Trigonometry: sin, cos, tan, arcsin, arccos, arctan
▸ Logarithms: log (base 10), ln (natural logarithm)
▸ Exponents: x², x³, xⁿ, square root, cube root, nth root
▸ Factorials, absolute value, modulo operations
▸ Constants: π (pi), e (Euler's number)
▸ Parentheses for complex, nested expressions
▸ Degree / Radian toggle
▸ Live expression display — see full equation as you type

💱 CURRENCY CONVERTER – 130+ LIVE CURRENCIES
Real exchange rates updated daily. Works offline with last synced rates.
▸ USD, EUR, GBP, JPY, CNY, AED, INR, SAR
▸ AUD, CAD, CHF, KRW, BRL, MXN, ZAR, THB
▸ All major and 120+ regional currencies worldwide
▸ Type and convert instantly

📏 UNIT CONVERTER – ALL CATEGORIES
▸ Length: km, m, cm, mm, mile, yard, foot, inch
▸ Weight: kg, g, mg, lb, oz, ton, stone
▸ Temperature: Celsius, Fahrenheit, Kelvin
▸ Volume: liter, ml, gallon, fl oz, pint, quart, cup
▸ Area: m², km², ft², mile², acre, hectare
▸ Speed: km/h, mph, m/s, knot
▸ Data: GB, MB, KB, TB and more

📅 DATE CALCULATOR
▸ Exact days, months and years between any two dates
▸ Add or subtract days, weeks or months from any date
▸ Find the day of the week for any past or future date

💰 DISCOUNT, TIP & PERCENTAGE CALCULATOR
▸ Discount: enter price and % — see savings and final price instantly
▸ Tip: calculate tip and split bill between any number of people
▸ Percentage: find any % of any number with one tap
▸ GST, VAT and sales tax calculator

✅ WHY THIS CALCULATOR STANDS OUT
▸ Floating widget — runs on top of other apps, no switching needed
▸ AI Math Solver — explains every step, not just the final answer
▸ 100% free — no subscriptions, no paywalls on core features
▸ Fully offline — all features work without internet
▸ Light and dark theme — automatic or manual
▸ Calculation history — scroll back through all previous results
▸ Haptic feedback — satisfying feel on every key press
▸ Instant launch — opens in under one second
▸ Lightweight — minimal storage and battery usage
▸ Works on all Android devices — budget to flagship
▸ No ads interrupting your calculations
▸ Privacy first — no personal data collected

📲 PERFECT FOR
Students, teachers, and parents doing homework and exam prep. Engineers and scientists verifying calculations. Shoppers comparing prices and discounts. Travelers converting currencies on the go. Business professionals calculating taxes, margins, and commissions. Anyone who needs a reliable, fast, all-in-one calculator always ready.

Download Calculator – Fast & Simple. Free, offline, and built for real everyday use.