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Seems like a really useful idea and great execution too. I've never used the real punch cards in action before, may be I'm not aware of it. But this is something that I would definitely love to use!

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Never used real punchcards?? That's impressive... something like ~94% of Americans have them laying around. Whenever I pitch Punchd to a group of people they all have punchcards and they all always forget them at home.

Feature request: Notify me when I enter a location that uses the service.

It's just as easy to forget about punch cards on your phone as it is to forget about them in your wallet.

This looks like a great product. I can't wait for you to expand your venues.

That's a fun idea, but we'd destroy your battery polling the gps. The best we can do is put up some fancy posters so you remember when you're standing in line :)

Could just have a "does this place support punchd" button to do this, too.

We do have a list of nearby venues. Nearby is defined as ~10 mile radius.

IIRC you can use cell tower loc only when using background location & geo-fences on the iPhone for local notifications.

Maybe notify a user only for 'popular' punch'd locations?

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