The number of projects being developed for the iPhone, iPad and iPod touch has jumped this year, while Android's share of the market has dropped, according to analysts.

Flurry, a provider of in-application analytics for mobile devices, reported there was a second quarter surge in development of new software for the iPad, iPhone and iPod touch in the second quarter. The report, released last week, states that the number of iOS projects rose to 57 percent of what developers were working on, from 54 percent in the first quarter. The number of iPad projects rose to 15 percent from 10 percent. Meanwhile, while the number of projects aimed at Google's Android OS dropped to 28 percent from 36 percent.

This is the second quarter that Apple has gained in developer interest and Android has declined; the report cites the launch of the iPad2 and the introduction of the iPhone to US network Verizon as major factors.

"Apple reported that it had sold a cumulative 200 million iOS devices. Currently the App Store contains more than 425,000 apps, with total downloads surpassing 15 billion," stated the report. "From the developer's point of view, the most attractive aspect of the iOS consumer audience is that they all have credit cards on file with iTunes. This means 100% of them can seamlessly pay for apps and in-app purchases. All told, the App Store offers a powerful business opportunity to developers and has attracted leading mobile developer support."

However the report also noted that Google's more open Android OS distribution strategy has garnered the support of numerous notable OEMs. "This is spawning a rapidly growing installed base of Android devices that is gunning to overtake the iOS installed base," said the report.

Another factor driving developer sentiment could be simply that iOS users buy more and pay more.

Piper Jaffray analyst Gene Munster told the GigaOM site that iOS users buy more apps and pay more for them than other platform users--including Android. Munster reports that an average iOS user downloads 83 apps (up from only 51 the year prior) at an average sale price of $1.48 (up from $1.29 the previous year). Munster also states that the average sale price of the top 30 paid iOS apps is up 36 percent from 2010 to $6.32.

Tony Bradley of PC World contributed to this report