Minor fixes and improvements.

Bugfix for back help page.

Bugfix for iOS 9.

Add missing assets.

Bug fix for iOS 13.

1. added auto-rotate support.
2. optimized the display font.

iOS 9 optimization.

minor improvement.

upgrade to iOS 8.

minor bug fix.

ready for iOS 7.

minor bug fix.

bug fixes on key 1, 2, 3, and - iPhone 5 image errors.

minor bug fixes.

1. Add iPhone 5 support
2. Add back the on key to let users easily turn on/off the calculator.

minor bug fix.

1. add manual page
2. bug fixes.

1. change to use fixed width digital font in display.
2. redesign icon and app name change.

1.redesign the menu interface
2. optimize user manual page with back and reload function
3. redesign key click sound
4. add more options like in app support access, about page, and other pages
5. add quick start help with one-click access

optimize user manual page with back button and loading icon.

improved app stability.

add an option to use comma as decimal point

update user manual page to new website.

bug fix for minor issues.