Added Czech and Polish localizations.

Fixed problem with automatic language detection.

修复了自动语言检测的问题。

New interface.

Now you can solve 2x2 and 3x3 systems of equations.

2x2 systems can be solved by substitution or using Cramer's rule.

New app icon.

General improvements and bug fixes

New refreshed look and interface improvements.

Shows step by step solution.

Supports fractional coefficients.

Shows results as decimals and fractions.

Added history list.

Back and forward buttons to check or recall recent calculations.

Sends results and history via email.

Supports both portrait and landscape orientation.

Minor bug fixes and performance improvements.

Added 'Undo' for the Clear command.

Added seven color styles.

支持 iOS 8.

Includes interface improvements.

Minor bug fixes.

Added support for new languages: Spanish, Portuguese, Danish, Dutch, Italian, Finnish, Greek, Turkish, Japanese, Korean, Norwegian, Swedish.