iAd & AdWhirl? Or Just one of them?

I currently have iAds working in my app... but, since I'm looking to support iPhone 3.x a开发者_开发知识库s well... is it worth it to implement and set up AdWhirl?

Or is the market share for 3.x vs 4.x not worth much? Anyone have any stats around this?

Thanks!

Note : Now AdWhirl is not working. now you can use AdMob mediation

Best tutorial of AdMob mediation

AdMob_Mediation_Demo

You can download it and use it in your project

Regardless of whether you support 3.X or not I'd recommend using AdWhirl. You can read my blog post on why but to summarise

1) iAds are currently only available in US and UK. You'll want to pull in another supplier for different countries. 2) iAds only supply a fill rate of maybe 10% if you're lucky. That means 9 out of 10 times you don't get an advert. In these cases you want AdWhirl to go get you another one.

If go iAd only then you'll lose out on a lot of revenue.

I'd recommend using mopub instead of AdWhirl. It has support for a lot of ad networks built in, without having to add more SDKs to your app, and server side there are a lot of switches and knobs you can tweak to fine tune your ad display.