All in One Smart Calculator
iOS app by TrueNorthLabs Inc.. Utilities · TrueNorthLabs Inc.
- Store rating
- 0 / 5
- Store rating count
- 0
- Download price
- Free to download
- In-app purchases
- Unknown
- Version
- 1.15.0
- Listing last refreshed
- 2026-09-11
View the original store listing
Store description excerpt
Simple to use, with every function you actually need — from quick everyday math to real formulas and unit conversion. ■ Calculator • Arithmetic, percentage, sign toggle • Scientific functions (sin, cos, tan, log, ln, √, powers) • Constants (π, e) and parentheses • Memory keys (M+, M-, MR, MC) ■ History and favorites • Saves up to 100 calculations automatically • Star the ones you want to keep • Delete one by one or clear them all • Export as text ■ Handy tools • Fuel economy — mileage from distance and fuel added. Shows km/L, L/100km and MPG (US/UK) together, so foreign figures read in your own units. EVs too (km/kWh, kWh/100km, mi/kWh) • Fuel cost — total cost, fuel needed and cost per distance. A round trip switch covers your commute in one step. EV charging works the same way • Discount — savings and final price, by percentage or fixed amount • Tip — total and per person from amount, rate and party size • Split the bill — excludes separately paid amounts, then divides by headcount • Unit price — compares two products per 100g, 100mL or per item • Stock averaging — new average price and total cost after buying more, plus gain/loss at the current price • Ovulation — ovulation date, fertile window and next period from your last period and cycle (nothing is saved) • Scan and sum — reads numbers from a photo and adds them up, on your device • Unit conversion (length, weight, temperature, time, speed, volume, area, data) • Time zones — move the hour in one city and compare the world at a glance (50+ cities, DST handled, offline) • Date calculator — days between dates, add or subtract days, age ■ Formula book (interactive) • 71 formulas across geometry, finance, trigonometry and algebra, physics, and astronomy • Enter values and it calculates on the spot — a tool that answers, not a chart • Geometry shapes label your values on the matching side or radius in real time • Every formula has a how-to sheet and a note on where it came from (all 9 languages) ■ Tax tools by country (Settings > Region) Your country of residence is separate from your display language, and decides which tools appear. • VAT calculator — 8 countries. Two-way net/gross with standard and custom rates (China 13/9/6/3%, Germany 19/7%, Spain 21/10/4%, France 20/10/5.5/2.1%, Italy 22/10/5/4%, Netherlands 21/9%, Belgium 21/12/6%, Austria 20/13/10%) • Japan — consumption tax (10%/8%/custom, three rounding modes), simplified taxation, invoice transition relief, the 20% special rule, and resale profit • Korea — net salary, the four major insurances, severance pay, VAT, compound interest, savings interest and annual leave • A disclaimer on first open, plus a help sheet in every tool ※ Results are for reference. For actual filing and payment, please consult a tax professional or your national tax authority. ■ About Pro • The calculator stays free — arithmetic, scientific functions, memory, history and themes • Tools, country tax calculators, the formula book and photo math open with a
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