# Calculator - Currency - Unit — history manager, caret support > Multi-function scientific calculator with currency and unit conversion. (iPhone/iPad app by hua-shan cheng.) - Source: https://appshunter.io/ios/app/calculator-currency-unit/id1583572133 (this page in markdown: same URL + `.md`) - Developer: [hua-shan cheng](https://appshunter.io/developer/1019388170) - Category: Utilities - Price: Free with in-app purchases (on sale, was $4.99) - Rating: 5.00/5 from 4 App Store ratings · 3 written reviews indexed - Age rating: 4+ - Requires: iOS 12.0 · 19 MB - Languages: American English, Chinese (Simplified, China), Chinese (Traditional, Taiwan) - Released: 2021-12-16 - Data updated: 2026-06-04 - Monetization: free with in-app purchases - User reviews in markdown: https://appshunter.io/ios/app/calculator-currency-unit/id1583572133/reviews.md ## What is Calculator? This multi-function app is a scientific calculator packaged with currency converter and unit converter. It is powerful and user-friendly for school, work and for everyday use. == Feature Highlights == • History Manager: review calculation/conversion history, reuse/share/insert/copy expression and result, and delete individual/all records. See below for details. • iPad Landscape Mode: display functions and numeric keys side by side for higher efficiency, or display history records and numeric keys side by side. See below for details. • Full editing options: Undo, Redo, Select, Select All, Cut, Copy, Paste, and Cancel • Full expression display in multiple lines: review and easily check entry errors • Caret support, easier to edit an entry • Instant detection and identification of invalid entries • Unique and playful button sound and haptic effects, both mutable (note: haptic effects are only available on iPhone 7 & plus and later iPhone models) • Aesthetic in user interface, easy and simple to use == Scientific Calculator == • +, −, ×, ÷, (), +/-, %, delete, clear-all • (Inverse) trigonometric functions: sin, cos, tan, asin, acos, atan (radian & degree) • (Inverse) hyperbolic functions: sinh, cosh, tanh, asinh, acosh, atanh • Constants: e, π • Scientific notation E: enter numbers in the format of scientific notation, such as, 1.8E6 or 2.21E-10 • Roots: square root, cubic root • Power & exponential functions: x^2, x^3, x^y, 2^x, 3^x, 10^x, e^x • Logarithmic functions: ln, log2, log10 • Absolute value: |x| == Currency Converter == • +, −, ×, ÷, (), +/-, %, delete, clear-all • Converts back-and-forth and does calculation as well • Supports daily updates for 37 major world currencies (AED, AUD, BGN, BRL, CAD, CHF, CNY, CZK, DKK, EUR, GBP, HKD, HUF, IDR, ILS, INR, ISK, JPY, KRW, MXN, MYR, NOK, NZD, PEN, PHP, PLN, RON, RUB, SAR, SEK, SGD, THB, TRY, TWD, USD, ZAR) • Supports offline conversion. When there is no internet connection, last downloaded rates are available for conversion. • Daily updates from three trusted sources: the U.S. Federal Reserve, European Central Bank, Bank of Canada == Unit Converter == • +, −, ×, ÷, (), +/-, %, delete, clear-all • Converts back-and-forth and does calculation as well • Supports 13 common categories: Area, Data, Energy, Force, Frequency, Length, Pressure, Speed, Temperature, Time, Volume, Weight, Others • 181 units of measurement, 3,207 conversions • Supports both British Imperial and U.S. Customary • Supports unit measurements in both Mainland China & Taiwan == In-app Purchases == We offer the following two in-app purchases to access additional features. Your purchase and generous support can greatly help us to continue developing this app. Thank you! >> History Manager - USD$0.99, limited free trial: • One time purchase is for both iPhone & iPad • Review calculation/conversion history • Copy or share expression and result • Reuse expression • Insert expression or result at the caret (cursor) with detection of error/invalid input • Delete individual or all records • History records are listed in alternate colors for easy browsing, each is marked with its date of creation. Long expressions are compressed or expanded automatically. • Calculator, Currency and Unit converters all support History >> iPad Landscape Mode - USD$0.99, limited free trial: • When using Calculator, iPad Landscape displays functions and numeric keys side by side, for higher efficiency. Calculation history and numeric keys may also be displayed side by side, allowing you to watch recordkeeping of calculation simultaneously. • When using Currency & Unit converters, iPad Landscape displays conversion history and numeric keys side by side, allowing you to watch recordkeeping of conversion simultaneously. == Support == • Website: https://www.theequally.com • Contact us: calculatorcu@theequally.com == Credits == UX designer: Cheryl S. Yee UI designer: Cheryl S. Yee ## Key features - Scientific calculator functions - Currency converter with 37 currencies - Unit converter with 181 units - History manager for calculations - Offline currency conversion - Full editing options (undo/redo) ## Pricing and in-app purchases Base price: Free. **One-time purchases** | Purchase | Price | Type | | --- | --- | --- | | Unlock iPad Landscape | $0.99 | one-time | | Unlock History | $0.99 | one-time | ## Recent user reviews (3 of 3) All indexed reviews: https://appshunter.io/ios/app/calculator-currency-unit/id1583572133/reviews.md ### 4/5 — Excellent calculator *2024-03-24* All the features you want in one app, unit conversion, basic calculator and currency conversion. However please add AED to the currency conversion and the option to have more than two currencies when comparing currencies. **Developer response:** Thank you for your valuable feedback. We have added currency AED in version 3.1.3. ### 5/5 — Useful tool *2023-05-20* The currency exchange function is really useful and straightforward!!! **Developer response:** Thanks so much for your comment! Two more exciting features coming soon. ### 5/5 — Great design! *2023-05-16* Can do more calculations with this calculator! I love it’s multi function! **Developer response:** Thank you so much. We love the feature and design too! ## Frequently asked questions about Calculator ### What is Calculator - Currency - Unit? Calculator - Currency - Unit is a multi-function app that serves as a scientific calculator, a currency converter for 37 major world currencies, and a unit converter for 181 different units across 13 categories. It is designed for ease of use in school, work, and everyday life. ### Does Calculator - Currency - Unit have ads? No, Calculator - Currency - Unit is ad-free. The developer has stated that the app does not contain advertisements, allowing for an uninterrupted user experience. ### Can I use Calculator - Currency - Unit offline? Yes, the currency converter feature supports offline conversion. When an internet connection is unavailable, the app will use the last downloaded exchange rates for conversions. ### What are the in-app purchases for Calculator - Currency - Unit? The primary in-app purchase is for the History Manager, which costs $0.99. This unlocks features like reviewing calculation/conversion history, copying or sharing expressions and results, and reusing expressions. A limited free trial is also available for this feature. ### How many currencies does Calculator - Currency - Unit support? Calculator - Currency - Unit supports daily updates for 37 major world currencies. These include currencies like USD, EUR, GBP, JPY, and many others, facilitating global financial calculations. ### What kind of scientific functions are available? The scientific calculator includes standard arithmetic operations, trigonometric and hyperbolic functions (both inverse), constants like e and π, scientific notation, roots, power and exponential functions, logarithmic functions, and absolute value. It also features full expression display and caret support for easy editing. ### What is the update frequency for Calculator - Currency - Unit? The app was last updated on March 17, 2026, indicating a recent update. Currency exchange rates are updated daily from trusted sources like the U.S. Federal Reserve and European Central Bank. ### What devices is Calculator - Currency - Unit compatible with? Calculator - Currency - Unit is compatible with iPhone, iPad, and iPod devices. It also features an iPad Landscape Mode for enhanced efficiency on larger screens. ## Version history (last 5 releases) ### 3.1.6 — 2026-03-17 - improvement in exchange rate updates - improved the layout of the app window on iPadOS 26.* when the devices are set to "Windowed Apps" in settings ### 3.1.5 — 2024-11-12 - currency update of GBP, EUR, AUD and NZD based on the latest exchange rate data format by the Fed - performance improvements ### 3.1.4 — 2024-06-01 - updated for iOS/iPadOS 17.5.1 - improvements ### 3.1.3 — 2024-04-09 - added currency AED - improvements ### 3.1.2 — 2024-04-01 - improvements and bug fixes ## Apps similar to Calculator | App | Rating | Price | Category | | --- | --- | --- | --- | | [Planimeter: Area & Distance](https://appshunter.io/ios/app/planimeter-area-and-distance/id1469347201) | 4.7 (111) | Free | Utilities | | [Photo & Image Compress](https://appshunter.io/ios/app/photo-and-image-compress/id6449292959) | 3.0 (1) | Free | Utilities | | [DayCalc Pro - Note Calculator](https://appshunter.io/ios/app/daycalc-pro-note-calculator/id654444242) | 4.6 (177) | $0.99 | Utilities | | [Floating Clock - Desktop time](https://appshunter.io/ios/app/floating-clock-desktop-time/id1609851584) | 5.0 (5) | $5.99 | Utilities | | [Beautiful Compass Pro](https://appshunter.io/ios/app/beautiful-compass-pro/id1120591899) | 5.0 (5) | $0.99 | Utilities | | [Flex Scanner - PDF Scanner](https://appshunter.io/ios/app/flex-scanner-pdf-scanner/id1521904431) | 4.5 (25) | Free | Utilities | --- *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 2026-06-04.*