Get a coffee, give a coffee API

Posted to Data Sources  |  Tags: , ,  |  Nathan Yau

Jonathan Stark, a mobile application consultant, is running an interesting social experiment with his Starbucks card:

Jonathan’s Card is an experiment in social sharing of physical goods using digital currency on mobile phones. I stumbled on the idea while doing research for a blog post about Broadcasting Mobile Currency.

Based on the similarity to the “take a penny, leave a penny” trays at convenience stores in the US, I’ve adopted a similar “get a coffee, give a coffee” terminology for Jonathan’s Card.

Simply save the picture of Jonathan’s Starbucks card onto your smartphone and use it to buy your coffee. If you like, add money to the card so that someone else can buy a coffee.

The best part is that Stark provides a simple API that returns the balance on the card every minute. When do people buy coffee? How do people give and take? Are people more likely to give when there’s a large balance or when there’s nothing left? Lots of fun things to look at.

[Jonathan’s Card via @kn0thing]

Favorites

Where People Run in Major Cities

There are many exercise apps that allow you to keep track of your running, riding, and other activities. Record speed, …

How to Spot Visualization Lies

Many charts don’t tell the truth. This is a simple guide to spotting them.

Real Chart Rules to Follow

There are rules—usually for specific chart types meant to be read in a specific way—that you shouldn’t break. When they are, everyone loses. This is that small handful.

Jobs Charted by State and Salary

Jobs and pay can vary a lot depending on where you live, based on 2013 data from the Bureau of Labor Statistics. Here’s an interactive to look.