Can i turn my old iPhone 4 into a DVR? There must be a way

I just purchased an iPhone 5 and that leaves me with a perfectly fine iPhone 4.It has plenty of memory and processing power. I'm looking for alternate uses. I've been using it as a Roku remote but that isn't really using it to the full potential.

No. It has no A/V inputs, and for video its storage is paltry.

I would use it as an alarm clock radio/weather station.

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