update target sdk and performance improvement

Display optimization for dark mode.

UI and algorithm optimization.

Fix iPhone XR display issue in zoomed display mode.

Bring back the classic HP 12C theme as requested by users.

Design optimization and bug fixes for auto-rotate and crash issue. We will bring back the old design as an option in a few days. Thanks to all feedbacks.

Redesign for iOS 12. This is the biggest update ever since the first release. Hope you like it, and welcome any feedback.

icon redesign.

Changed app icon to solve the conflict with HP 12C app.

Changed app name to Vicinno Financial Calculator to solve the name conflict with HP 12C app.

minor bug fix.

fixed iPad bottom keys not responding bug.

bug fix.

minor bug fix.

optimized for iOS 9.

Finally, add back the long-waiting auto-rotate support. Now you can play on portrait mode. thanks for all your patience.

minor bug fix.

bug fix for iOS 7 crash issue.

- upgrade to iOS 8.

- be sure to check out our 12E and 10bii Financial Calculator bundle, and get the popular 10bii Financial Calculator at only 1$ more.

minor bug fixes.

1. add an option to lock the auto-rotate to landscape mode.
2. some minor bug fixes.

iOS 7 optimization.

iOS 7 optimization.

ready for iOS 7.

This is 12E Financial Calculator's biggest update yet:
1. Upgrade to support iPad to become an universal app.
2. Support autorotate in iPad, iPhone, and iPhone 5.
3. Redesign iPad UI to take the full screen for a better display.

We listen to you, and add the requested improvements as follows:
1. Add copy to clipboard feature, so the figures on the display can be easily copied to other apps. the reverse (copy to display from other apps) is not achievable since  it is a calculator app and key tapping is the only way to input. (Sorry about it)
2. Change key click sound to a more enjoyable one.

We are working hard on other requests; meanwhile, keep all ears for the new ones. Thanks for your great feedbacks and patience.