- currency update of GBP, EUR, AUD and NZD based on the latest exchange rate data format by the Fed - performance improvements

- updated for iOS/iPadOS 17.5.1 - improvements

- added currency AED - improvements

- improvements and bug fixes

- performance improvements - rearranged the option buttons for sound and haptic effects

V3.1 updates the following improvements to facilitate latest In-App Purchase features: - Popup reminder that tapping “f/H” can enable switch between “History Manager” and “Scientific Functions” or switch between “History Manager” and “(), +/-, %”. - To avoid confusion, an explanatory message is displayed when there is no record in History. - When History trial ends, an “info” button will be displayed, tap for details. - At any time, you are welcomed to find out more about In-App purchase by tapping the upper right About button “…”, and tap “Unlock”.

Version 3.0 is our second mile stone release, with great new features and many improvement updates: Two new features (in-app purchase with limited free trial): • History Manager: review calculation/conversion history, reuse, share, insert, copy expression and result, and delete individual/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. See full app description for more 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. This strong feature also allows you to watch recordkeeping of calculation/conversion simultaneously. See full app description for more details. • The two in-app purchases above is USD$0.99 each. Your purchase would mean a lot, really appreciate your strong support to keep us going. Thank you! Other improvement updates: • Function button “f” is relabeled as “f/H” to indicate interchangeable functions of Scientific Functions & History Manager. Tapping this button lets you switch between Scientific and History. Use the close button “X” next to “f/H” to switch back to numeric keypad. • Enhanced detection for error and invalid input, especially when Paste option is applied. • Unit converter’s Weight category added two new units: Carat (ct) & Troy Ounces (oz t). • In Unit converter’s Data category, units are rearranged and labeled to indicate explicitly based-2 (binary system) or based-10 (decimal system). For example, "(base 2) Kibibyte (KB, KiB)” means “1 KB = 1024 B”, and “(base 10) Kilobyte (kB)” means “1 kB = 1000 B”. • Button “...” added new share option. • Optimized button size. • Improved the display of unit drop-down menu on all iPad models. • Other improvements. • Fixed minor bugs.

Version 2.0.2 further optimizes the last version 2.0.1: - Visual improvements for the About dialog box, in both light mode and dark mode (About dialog box is displayed when you tap the button "..." at the upper right corner) - Additional feature to close the About dialog box by tapping anywhere outside the box

The new button "..." offers the following handy features: - Display of current version number of the app on your device - Quick link to app product page on App Store, making it easier to update to the latest version - Shortcut to copy the app link and share with family and friends in no time Note: future update will include landscape orientation on iPad, we are rushing for it!

This mile stone release 2.0 offers solid support for scientific calculation as follows: - sin, cos, tan, asin, acos, atan (radian & degree) - sinh, cosh, tanh, asinh, acosh, atanh - e, π - scientific notation E - square root & cubic root - x^2, x^3, x^y, 2^x, 3^x, 10^x, e^x - ln, log2, log10 - |x| - The new button f replaces the old button E. In Scientific Calculator, button f supports 29 common features for scientific calculation. The original scientific notation E is now listed under button f. In Currency & Unit converters, button f supports (), %, +/-. Other improvements: - Improved the display of all currencies & units in dark mode - Improved the display of +, −, ×, ÷ in light mode - Fixed a bug which, in some particular case, does not allow switch between fields in Currency & Unit converters - Fixed other minor bugs

- Two haptics effect options are now available for iPhone 7 & Plus and all later iPhone models - Enhanced performance in general

- Added two vibration effects - Fixed a responsiveness bug, previously occurred occasionally on buttons in the last row

- Added Undo & Redo editing options. The full list of options now includes Select, Select All, Cut, Copy, Paste, Undo, Redo, and Cancel. - You can now copy the preview results by simply double-tapping or long-pressing the number, then select Copy. - New feature to protect your privacy. The app no longer supports pasting data from other apps while copy-and-paste within the app as well as copying within the app and pasting into other apps, such as emails, are still enabled. - All data are now downloaded through HTTPS - Fixed minor bugs

In this update, we have further optimized the display format of calculation expressions for all models of iPhone, iPad, and iPod.

Thanks for using “Calculator - Currency - Unit”. This update offers the following improvements: - Fine-tuned sound effects - optimized editing options

Thanks for using “Calculator - Currency - Unit”, the latest version is now available for download. In addition to some improvements, we have also added new features as follows: - Fully supports Select, Select All, Cut, Copy, Paste, and Cancel commands. - You receive notification when there is a new version on the App Store. You will be notified no more than twice, and can choose to update now or later.

Thanks for using “Calculator - Currency - Unit”. We have improved and enhanced the app to make it even better, as follows: - enhanced Back button to support continuous delete - improved user interface and performance in some areas - added one more sound option - improved the existing sound effects - now when you have done a calculation and press Back button, it only deletes the last number digit of the result, instead of clearing all - fixed a few minor bugs We wish you a Merry Christmas & Happy New Year!