Develop an iPhone app and pocket $500 a month - not so hard. Apple just reported a whopping quarter: all-time highest revenue and profit. It sold 8.7 million iPhones and 3.36 million Macs during the quarter. This follows a string of blowout quarters. Can you grab a bite out of Apple’s success?Sure, ride the coattails of Apple’s iPhone and become an app developer. “It’s not hard getting $16 to $17 a day, or $500 a month, with an iPhone app,” says Krishna Subramanian, founder of Mobclix, which operates a mobile ad exchange marketplace.For more serious developers, you’ll have to develop maybe 10 apps and still be lucky enough for one of those apps to catch fire and produce $10,000 a month. Some of the game-changing apps make thousands of dollars a day. Reaching those levels isn’t easy, but it’s possible. You won’t even need to charge for your app, either. “A scrabble-type app did 10 million impressions a day in December,” Subramanian says. “A free app can make more money than a paid app because of ads.”December was a huge month for most developers. One iPhone app developer made enough money in that month alone to thwart courting venture capitalists, Subramanian says. How much can you really make? If your CTR (click-through rate) is .75 percent to one percent, says Subramanian, expect a dollar CPM (cost per thousand impressions).Of course, there’s no guarantee for success. “Microsoft spent a ton of money on the Bing app in December to get that app on the top,” Subrmanian says. “It made the top ten app, but I don’t think that that was a huge success for them competing against Google Search.”Got a different take? Send me an email at tkaneshige@cio.com. Or follow me on Twitter @kaneshige. Follow everything from CIO.com on Twitter @CIOonline. Related content opinion Google Bigwig Eric Schmidt Posts Bizarre Guide for 'Converting to Android from iPhone' Google's Executive Chairman wants you to switch from iPhone to Android, and he posted a strange guide to help make the transition as smooth as possible. By Al Sacco Dec 09, 2013 2 mins Smartphones Android Operating Systems opinion Apple's 'Spaceship' Campus Evokes Jobs-Era Perfectionism Some facts have emerged about Apple's planned "spaceship" campus. Delayed and over-budget but painstakingly detailed, it's already part of Apple history, and makes CIO.com's Tom Kaneshige nostalgic for Steve Jobs' maniac By Tom Kaneshige Apr 05, 2013 3 mins Financial Services Industry Innovation IT Leadership opinion Apple, Where Art Thou? Apple is under siege and uncharacteristically running for cover amidst mounting competition and research reports favoring Android. By Tom Kaneshige Mar 12, 2013 2 mins Smartphones Tablets IT Leadership opinion Is Computer's Future a Glass House? According to Google and Corning, glass surfaces and eyeglasses are where we'll do our computing in the future. By Tom Kaneshige Mar 06, 2013 1 min Small and Medium Business Innovation Mobile Podcasts Videos Resources Events SUBSCRIBE TO OUR NEWSLETTER From our editors straight to your inbox Get started by entering your email address below. Please enter a valid email address Subscribe