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Which one is better- iphone apps or EVO 4G apps?

Grow with Dr Prem

So the iphone has had about a 3 year head start but HTC really needs to kick it into high gear and fast. 90% of the apps are useless to me and the rest are fine but isn’t there an app for battery maintenance? Like the iphone has battery doctor which is awesome. It slowly charges the battery. After I used battery doctor my battery lasted 8 hours longer. Where is our battery doctor? Pleas tell me which one is better?

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