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by sghiassy 3253 days ago
I built 'h34t' - shows a realtime heatmap of where people are in the city (search iTunes Store for it).

Snapchat just paid $300 million for the same functionality. They could've bought it from me for a lot less ;)
2 comments
gesman 3250 days ago
Your app shows that nothing happening neither in San Jose nor in SF? iPhone 7+.

Maybe that forced Snapchat to spend more money? :)

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sghiassy 3249 days ago
The filter is set to show activity in the last month only - slide the filter to all and you'll see activity.

The app has gone a bit into hibernation lately, so the activity has waned.

Thx for checking it out though!

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skdjksjdksjdk 3253 days ago
How do you do it?
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sghiassy 3249 days ago
Not sure what you mean by the question?

I built the full stack by hand. The iOS is Obj-C and the backend is NodeJS/MySQL.

Basically, the MySQL DB has checkin data (provided by users or from social media networks) pivoted on metadata (male, female, age) and then passed to a custom visualization algorithm on the mobile device.

Happy to answer any other questions.

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