Calculator - Currency - Unit 3.1.5

The application serves as a multifunctional tool, combining a scientific calculator with a currency and unit converter. Its design prioritizes both power and user-friendliness, making it suitable for academic, professional, and everyday use.

Feature Highlights

• History Manager: Allows users to review calculation and conversion history, with options to reuse, share, insert, copy expressions and results, and delete records individually or collectively.
• iPad Landscape Mode: Offers side-by-side display of functions and numeric keys or history records for enhanced efficiency.
• Full Editing Options: Provides extensive editing capabilities including Undo, Redo, Select, Select All, Cut, Copy, Paste, and Cancel.
• Multi-line Expression Display: Facilitates error checking by allowing full expression visibility.
• Caret Support: Simplifies the editing of entries.
• Instant Validation: Recognizes and highlights invalid entries instantaneously.
• Auditory and Haptic Feedback: Features distinctive sound effects and haptic feedback, which can be adjusted (note: haptic feedback is available only on iPhone 7 and later models).
• Aesthetic User Interface: Designed for simplicity and ease of use.

Scientific Calculator Features

• Basic operations: +, −, ×, ÷, along with functions for parentheses, negation (+/-), percentage calculations, deletion, and clear-all.
• Trigonometric functions: offers sin, cos, tan alongside their inverses (asin, acos, atan) in both radians and degrees.
• Hyperbolic functions: includes sinh, cosh, tanh and their inverses (asinh, acosh, atanh).
• Access to mathematical constants such as e and π.
• Scientific notation support: input in formats like 1.8E6 or 2.21E-10.
• Root calculations for square roots and cubic roots.
• Power and exponentiation functions: x^2, x^3, x^y along with base exponentials such as 2^x, e^x.
• Logarithmic functions including natural log (ln) and common logs (log2, log10).
• Absolute value function: |x|.

Currency Converter Features

• Basic operations: +, −, ×, ÷ along with additional functionalities similar to the scientific calculator.
• Dual-direction conversions with calculation capabilities.
• A comprehensive list of 37 major world currencies supported with daily updates (e.g., EUR, USD, JPY).
• Offline conversion functionality using the last downloaded rates during internet outages.
• Regular updates sourced from reputable financial institutions like the U.S. Federal Reserve.

Unit Converter Features

• Comprehensive support for basic arithmetic operations similar to other tools within the app.
• Supports bidirectional conversions and calculations within various unit types.
• Covers 13 common categories including Length, Temperature, Weight among others with a total of 181 units and over 3,200 conversions available.
• Makes allowances for both British Imperial and U.S. Customary measurements as well as regional specifications for Mainland China & Taiwan.

In-app Purchases

• History Manager - USD$0.99 (limited free trial): This one-time purchase unlocks features to manage calculation history across iPhone & iPad platforms effectively.
• • User-friendly browsing experience with color-coded history records marked by their dates of creation.
  • The capability to insert expressions at the cursor position while detecting errors or invalid inputs is included.
  • The history feature is supported across all calculator types including Scientific Calculator, Currency Converter, and Unit Converter.
• iPad Landscape Mode - USD$0.99 (limited free trial): Optimize your workspace by viewing functions alongside keys or conversion histories in landscape orientation on iPads for enhanced efficiency.

Support Information

• Website
• Email: [email protected]

Acknowledgments

• User Experience Designer: Cheryl S. Yee
• User Interface Designer: Cheryl S. Yee