- Updated design.
- Now you can easily round both decimal and fractional results. For decimals you can specify the desired number of decimal places after a decimal point. Fractions can be rounded to the nearest fraction of a specified denominator.
- From version 4.5.0 onwards, you can choose an output format to display results: "auto", "decimal", "fraction" or "decimal and fraction"
- Added the Square root button.
- Updated the engine for equations solving.
- Updated apps' icon.

Added Czech and Polish localizations.
Updated interface for iPhone XR.

Fixed problem with Chinese language auto-detection.

New interface.
Now you can solve linear, quadratic, cubic and quartic equations, including equations containing fractions and parentheses.
New app icon.

General improvements.

Interface and performance improvements.

A new refreshed look and interface improvements.
Added 7 color styles.
Supports both portrait and landscape orientation.
New app icon.
Minor bug fixes and performance improvements.
Added 'Undo' for the Clear command.
Added history list (last 25 results) with the ability to recall previous equations.
The results can be sent via email.

Interface and performance improvements and new useful features, including manual input, different display formats for results, and more.
News options significantly extend the range of linear equations in one variable that can be solved with xSolver.

Added support for linear equations in the form ax + b = c and ax + b = cx + d.
Interface improvements and bug fixes.
More detailed results.
Performance improvements.
Added language support for Portuguese, Danish, Dutch, Italian, Finnish, Greek, Turkish, Japanese, Korean, Norwegian, Swedish, and Chinese.