The value of mobile advertising to app developers has been the dark matter of mobile ever since the two largest mobile ad companies got snapped up by Google and Apple. Everybody knows it's there and it's powerful, but nobody seems to know what it actually looks like. Millennial Media has been talking about ad impressions by platform and device, but it wouldn't divluge other crucial advertising stats such as click-through rate, cost per impression, or total ad spend.
Finally an Ad company is talking again. Chuck Jones over at Forbes brings ad data from MoPub, which seems to be growing as Millennial is shrinking:
http://www.forbes.com/sites/chuckjones/2013/04/18/apples-ios-mobile-ad-metrics-dominates-android/
MoPub is an ad-serving platform for mobile applications that allows advertisers to bid on ad inventory from thousands of iOS and Android smartphone application providers/suppliers. Over 230 Tier 1 brand advertisers (up from 180 last quarter) and 58 of the top 100 largest advertisers use MoPub. The application providers come from the US, Europe, Asia and Latin America with 45 billion monthly ad impressions (up from 30 billion last quarter) across two dozen verticals.
Here are the key takaways from MoPub's report:
- iOS as a whole earns 75% of ad spend to Android's 25%.
- iPhone ad spending is roughly twice as high as Android phone spending.
- iPad ad spending is twenty times higher than Android tablet spending, the latter accounting for less than 1% of total.
- Higher click through and conversion rates allow ads on iOS to command a much higher price per thousand impressions than Android.
It's worth noting that while MoPub is providing a clearer picture of mobile advertising than anybody else right now, it's just one company in a very competitive market. It's business operations are liable to be biased for or against certain partners depending on that competitive landscape. For starters, it only seems to serve ads to iOS and Android apps.

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