This is an excellent app. I wish I had it when I was a student. The ability to compose complex equations visually and then evaluate them instantly makes the iPhone a superior scientific calculator that, with this app, takes the concept to a new level. You literally touch the equation to edit it and can enter values to evaluate it. The visual representation lets you instantly recognize errors in composition, unlike formulas encoded in textual representations. You can share it, use templates and re-use it. It even exports to PDF for use with other documents.
If you are a student of any discipline where math is used, this $9.99 app is a no brainer. If you are a professional engineer, scientist, or an analyst like myself, this is an app you can’t afford not to have.
Available at the App Store here.
Windows Phone had its day in the sun yesterday. After discarding its previous seven-year effort with Windows Mobile, Microsoft started with a clean sheet of paper. However, whereas the software has been re-built, the business model has not. WP is still a licensed operating system whose primary customers are mobile phone vendors. With Symbian mostly out of the picture, WP becomes only the second viable commercially licensed mobile OS, after Android.
So with two licensed platforms in the running, how do we measure success in the licensing business? Units sold to end users is one metric. But that data will have to include the performance of vendors and operators and other distributors. And it will take a year to do valid comparisons. The only indicative metric we have available today is how many devices have been committed by vendors.
As WP is out of the gate with device announcements, we can actually measure this. We can plot each vendor’s commitment to various platforms as an early indicator of strategic success. To that end, here’s the methodology: I took all smartphone vendors and tallied how many SKUs they have announced or leaked for either the WP or Android platforms (source: pdadb.net). I then plotted each vendor on two “commitment axes” (see notes below).