We are creating iOS and Android apps that will allow you to get the most out of SnapJet's technology. The app will resize your photo and position for a perfect transfer to the instant film inside SnapJet. It will also adjust your screen brightness, communicate with SnapJet's hardware, allow you to add effects, and we might even include some cool hacks for SnapJet like multiple exposure ;)
It's completely free and we'll post the source code for all our hackers.
UPDATE: We had a great question about how SnapJet deals with a smartphone's auto-screen-shut-off while exposing a photo. This has not been an issue with any of the phones we've tested, because SnapJet only requires a few seconds scan. However we're now also including a feature in our app so that the screen stays on just in case some users have aggressive energy-saving settings in place.