# Calto: Note Calculator — calculate w/ variables & units > calculate w/ variables & units (iPhone/iPad app by JONGWOO PARK.) - Source: https://appshunter.io/ios/app/calto-note-calculator/id6758614596 (this page in markdown: same URL + `.md`) - Developer: [JONGWOO PARK](https://appshunter.io/developer/1873952653) - Category: Productivity, Utilities - Price: Free - Age rating: 4+ - Requires: iOS 15.6 · 29 MB - Languages: American English - Released: 2026-02-07 - Data updated: 2026-08-05 - User reviews in markdown: https://appshunter.io/ios/app/calto-note-calculator/id6758614596/reviews.md ## What is Calto? A smart calculator that works like math notes. --- Just type "price = 12000" and you're done. Calto is a free smart calculator that lets you write naturally like a math notepad while showing results in real-time. --- Why Calto? Regular calculators just show numbers. But real-life calculations are more complex. - Planning a trip budget and splitting expenses - Converting currencies while budgeting - Calculating tips, discounts, or freelance rates Calto handles all of this naturally, like taking notes. --- Key Features # Variables coffee = 4.50 lunch = 12.00 coffee + lunch = 16.50 Name your numbers. Make calculations meaningful. # Exponent Calculations 2^10 = 1,024 3^3 = 27 Power calculations in one line. # Natural Unit Conversion 10km in mile = 6.21 25C in F = 77 500g in oz = 17.64 100m2 in acre = 0.025 80+ units supported. Length, weight, volume, temperature, time, area, angle. # Live Exchange Rates 100 USD in EUR = 92.50 50 GBP in JPY = 9,375 6 major currencies. Auto-updated every 24 hours. # Mixed Currency Math 100 USD + 50 EUR = $154.25 Different currencies in one calculation. Just works. # Date Calculations today + 30days = 2026-03-04 today + 2weeks = 2026-02-16 Project deadlines, travel dates made easy. # Percent & Tip Calculator 20% of 5000 = 1,000 15% tip on 85 = 12.75 Discounts, tips, split bills. Type what you think. # Crypto Calculator 1 BTC in USD = 97,500 0.5 ETH in EUR = 1,650 Live cryptocurrency rates. Track your crypto portfolio. --- Perfect For - Trip budgeting and expense tracking - Freelancers calculating rates and invoices - Quick tip calculator and bill splitter - Real-time exchange rate conversions - Anyone tired of basic calculators --- Privacy First - Offline Calculator - All calculations stored on device only - Works offline - no internet required for basic math - Only anonymized usage statistics collected (for service improvement) - No account required --- Support Email: iamjw.dev@gmail.com Website: https://calto.iamjw.kr --- Download this free calculator now and experience math notes done right. ## Version history (last 5 releases) ### 1.7.0 — 2026-07-31 Customizable number formatting and clearer error messages. - Number format settings: choose decimal places (auto/0/2/4), thousands separator (1,234 / 1.234 / 1 234 / none), and rounding (round/ceil/floor) - Inline hints now explain why a line failed (e.g., "Cannot divide by zero", "Unknown unit") - Your number format is applied everywhere — results, history, and share/export ### 1.6.0 — 2026-04-14 Modulo operator, discount/markup calculations, and share/export. - Modulo operator (mod) support (e.g., 17 mod 5 = 2) - Discount/markup calculations (e.g., 5% off 100 = 95, 5% on 100 = 105) - Share calculation sheets as text or image via OS share sheet ### 1.5.0 — 2026-04-01 Exponent operator and area/angle unit conversions. - Exponent operator (^) support (e.g., 2^10 = 1024) - Area unit conversions (mm², cm², m², km², acre, ha, etc.) - Angle unit conversions (deg, rad, grad, etc.) - Long-press result to insert value at cursor position ### 1.4.0 — 2026-03-07 ratio calculation (a : b = c : ?) ### 1.3.2 — 2026-02-27 - Fixed privacy policy and terms of service links - Updated app icons --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-05.*