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by ben1040 4867 days ago
WHAT TWOSOME NEEDS Twosome has to be installed on your and your sweetheart's phone. To create the special link you need a connection to the internet just for the moment both of you bump your phones. It doesn't matter how Twosome gets the connection (WLAN, EDGE, UMTS,...). From this moment on, NO further connection to the internet is required.

I must be missing something, if "no further connection to the internet is required." How does it send messages between two devices without an internet connection? Presumably if it's on iOS it's not using SMS...
1 comments
ecoffey 4867 days ago
I'm guessing it's syncing a seed to srand(), so neither of you control when the messages pop up
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scrumper 4867 days ago
That's elegant.

So, OP, I have to know: did you come up with the synced seed first and then try to build an idea around it, or did the idea of simultaneous, server-less, auto-generated endearments drive you to this solution?

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twanschik 4867 days ago
I had the gift idea for my girlfriend a few years ago. How to implement it came next (even so the tricky part was how to sync the seed)
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scrumper 4867 days ago
Interesting. I really do like it. It's naff but in the best possible way. (I'm working on something related for my wife at the moment but it's even cheesier than Twosome - not sharing it here :])

Do you do some sort of seed exchange/negotiation? Something like swap current system times, and use the higher as the seed?

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twanschik 4867 days ago
Something similar: both phones exchange a random seed and compute the arithmetic mean in order to get a common seed :)
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philsnow 4867 days ago
This biases the chosen seeds towards the middle.. You could do something like add them both together modulo the size of whatever the random seed is on the platform, that should be unbiased.
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twanschik 4867 days ago
That's correct. So once connected you will always get random notifications at the same time, even with NO network :)
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ben1040 4867 days ago
Aha, that's what I was missing. I didn't realize from the app description that it was a randomized message, and I thought it was one device's user sending a message to the other.
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