- Fixed bug that prevented app output from being shared from the iPad.

- Minor change to graph engine CorePlot.

- Updated graph to CorePlot version 2.4 - GUI changes

- Redesign and reworking of GUI. - Code changes to accommodate iOS 13. - Removed links to Facebook and Twitter. - Audio feedback when various objects are touched. - Changed most decimal precision from single (float) to double.

- Code tweaks to accommodate iOS 10.

- Changed button action from "Touch Up Inside" to "Touch Down" for quicker performance. - Code changes for simplification and improvement in logic.

- Changes to adapt to iOS 9, mostly involving fonts.

- New icons for buttons and other controls. - In iPhone version, double arrows increment or decrement repeatedly if the touch down is held. - Redesigned the app logo. - Updated the Facebook link syntax.

- Consolidated PDF report sharing options - Added AirDrop as a report sharing option - Added Facebook and Twitter posting

- By convention, linear regression is expressed as Y = function(X) where Y is the dependent variable and X is the independent variable. The iPad version now allows expressing the linear regression as X = function(Y) as an option. - Also, in the iPad version, you may estimate the dependent variable amount by entering an estimate of the independent variable. - Minor GUI tweaks. - Updated for iOS 8 and iPhone 6.

- Bug fix affecting computation of numerically small X-Y pairs. - Added correlation coefficient. - Bug fix affecting iPhone version when loading the first Y value from the stored data with the slider input option.

- Fixed bug that prevented adding a new data file without exiting app.

- iPad version now adds email, text message, and print capability. A PDF report at a resolution of 72 dpi is available for sharing. - Minor bug fix involving GUI interface.

- Rewritten and redesigned for iOS 7. - Added warning to prevent inadvertent resetting of all data in both iPhone and iPad versions. - GUI enhancements.

- Major revision that includes the option of adding data sets, retrieving saved sets, and deleting or reordering the saved sets.

- In iPad version, the behavior of the "info" and "clear" buttons have been modified to avoid unanticipated behaviors. Also, crashes resulting from touching the "+/-" button when the keyboard was displayed have been eliminated. - Clearing data now works properly.

- Streamlined source code for improved performance.

- Added a +/- stepper for adjusting number of pairs to regress. - Bug fix for iOS 5. - Minor GUI changes.

- Quick Linear Regression is now a Universal app. - The iPad version allows selection of the number of X-Y pairs to be regressed between 3 and 20. - The iPhone version modifies the way data entry fields are cleared by putting a "Clear" button above the numeric keypad.

- To simplify moving between the two methods of data entry, we have added buttons for "Keypad" and "Slider" in the lower right-hand corner of the data entry views. - On the 'Extended Regression' view, we added a reminder that a data entry of zero is a number, but a blank data entry is an 'n/a' that removes the x-y pair from the regression computation.

- Never mind. Removed upside-down portrait mode that caused display issues when editing. - Modified syntax of iTunes App Store link.

- Added ability to create values with zero to three decimal place precision in the 'Keypad Input' screen and changed the way that numbers are assigned plus or minus signs. - Extended the number of x-y pairs from 18 to 20 in the 'Keypad Input' screen. - In 'Keypad Input', removing a data entry with the 'n/a' description is accomplished by making the entry blank. - Improved floating point precision of all calculations from single to double. - Minor GUI changes.

- Added new page for 'keypad' data entry beyond the -1000 to +1000 numerical limits of the 'slider' data entry - Added 'Previous Item' button on slider data entry view for backward movement among data entry fields - Various display modifications