Intaglio SketchPad

Intaglio SketchPad was a graphics app developed by Purgatory Design for iOS with multi-touch support. It is a mobile version of the Intaglio desktop application for macOS.

Product history
A free "Lite" version was also released on December 4, 2010 with all the drawing tools of the full version, but without the ability to import/export files and print. The "Lite" version is also limited to a single drawing containing no more than 12 graphics.

Version history

 * Version 1.0 (November 5, 2009) required iPhone OS 2.1 and was tested for iPhone OS 3.
 * Version 1.4 (October 2, 2010) added boolean path operations and the ability to convert text blocks to paths.
 * Version 1.5 (October 29, 2010) added custom drawing sizes, grid setups, and the ability to save default properties for new drawings.
 * Version 1.6 (December 1, 2010) added support for iOS 4.2 and printing.
 * Version 1.7 (January 14, 2011) added the ability to import PDF, PNG and JPEG, and lock graphics.
 * Version 1.7.1 (January 24, 2011) fixed a bug in the Arrange menu.
 * Version 1.8 (August 5, 2011) added the ability to edit geometry numerically and set the angle of drop shadows.
 * Version 1.9 (October 19, 2011) added support for iOS 5 and the ability to export to Mac OS X through Bonjour.
 * Version 1.9.1 (November 9, 2011) fixed compatibility issues with iOS 5.
 * Version 1.9.2 (November 30, 2011) fixed a bug in the tool options.
 * Version 2.0 (June 1, 2012) added support for iCloud, autosave, layer blending options, and improved support for Retina displays.
 * Version 2.0.1 (June 13, 2012) fixed various bugs.
 * Version 2.0.2 (July 18, 2012) fixed various bugs.
 * Version 2.1 (December 20, 2012) added multi-styled text support in iOS 6 or later, and support for iPhone 5 and iPad mini screen sizes.
 * Version 2.1.1 (March 25, 2013) fixed text editing bugs.
 * Version 2.2 (April 12, 2014) improved compatibility with iOS 7.1 with support for updated UI.
 * Version 2.2.1 (April 22, 2014) fixed toolbar button bugs.
 * Version 2.3 (November 2, 2014) added support for iOS 8, and support for iPhone 6 and 6 Plus screen sizes.
 * Version 2.3.2 (January 27, 2015) fixed UI bugs under iOS 8.
 * Version 2.4 (May 8, 2015) added Dropbox support.
 * Version 2.5 (March 9, 2016) added iOS 9 and 64-bit support.
 * Version 2.5.1 (March 29, 2016) fixed various bugs, including when closing a drawing.
 * Version 2.5.2 (April 11, 2016) fixed a bug in importing images.
 * Version 2.5.3 (June 30, 2016) improved compatibility with iOS 10 and 9.7-inch 1st-generation iPad Pro.
 * Version 2.6 (January 15, 2018) required iOS 11.2 or later, and improved compatibility with iPhone X and 10.5-inch 2nd-generation iPad Pro.

Discontinuation
Purgatory Design's website went offline sometime after 2020. Longtime users unsuccessfully attempted to contact software engineer Nick Nallick.