Version 1.1.6

I recently released version 1.1.6, and it was approved by Apple in less than 24 hours. You should be able to update the application if you haven't already. It has the following new features:

• Redesigned the calculator screen so that it's easier to use.
• Enlarged the buttons.
• Added the ability to fix or edit previous calculations.
• Calculator history is saved even if you restart the application.
• Redesigned the equation editor for improved usability.
• Added an option to zoom only the x or only the y axis.
• Due to popular demand, there is now a square root button on the main keyboard.

Version 1.1.5

Version 1.1.5 is ready. You should be able to download in about two weeks from today.

• Added polar and parametric graphing support
• Added a random integer function
• Improved graphing speed, which was needed for the more complex polar/parametric graphs
• A few minor bug fixes and improvements

Polar/Parametric Graphing

Recently, quite a few people e-mailed me about the status of the polar/parametric graphing feature, so I decided to post a status update on here. I worked on it quite a bit this weekend, and it's very close to being ready. I plan to submit version 1.1.5 of the calculator to Apple within a week. I hear that Apple takes around two weeks to approve updates lately, so my current estimate is that you'll be able to download it within three weeks.

I also spent some time changing the look and feel of this website. The header image actually has two screen shots showing off the polar and parametric graphing support. The smiley face was created using 4 parametric equations, and the polar graph is showing the graph for: 

r(θ) = sin(10 * θ / 7)

In addition to adding polar/parametric graphing support, I fixed a few minor problems and improved the graphing speed. I have some really good ideas on how to improve the usability of the calculator screen. Many of you sent me great suggestions, and I would like to thank all of you. Version 1.1.6, which I'm going start working on shortly, will have a completely redesigned calculator screen with a large number of new features. I'll post more details once I get closer to releasing it.

Apple's Special Event and The Wall Street Journal

Yesterday morning, Apple held a special event where they announced new products, new features, and lower prices. As usual, you can watch the entire keynote in QuickTime. I was glad to see that 49 minutes and 10 seconds into the presentation, they displayed a screen shot from my Graphing Calculator app. I'm not sure if this will result in increased sales, but it's nice to see that someone at Apple likes me.

Also yesterday, the Wall Street Journal had a very interesting article about the new competition TI's graphing calculators are now facing. The article briefly mentioned some information about my app:

Last year, 29-year-old programmer Gabor Nagy released a graphing calculator app for Apple Inc.'s iPhone and iPod touch. In the first five months, a free version was downloaded by 1.2 million users, he said, and a version that costs 99 cents has sold more than 45,000 copies.

Version 1.1.4

Version 1.1.4 is now available in the App Store. This is a minor release with a few bug fixes. There will be a major update with polar/parametric graphing coming next.

• Fixed a bug responsible for incorrectly returning zero for the result of the first calculation.
• Fixed a rare crash bug
• Fixed spelling errors