Get a coffee, give a coffee API

Aug 7, 2011

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

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.

Top Brewery Road Trip, Routed Algorithmically

There are a lot of great craft breweries in the United States, but there is only so much time. This is the computed best way to get to the top rated breweries and how to maximize the beer tasting experience. Every journey begins with a single sip.

Years You Have Left to Live, Probably

The individual data points of life are much less predictable than the average. Here’s a simulation that shows you how much time is left on the clock.

How We Spend Our Money, a Breakdown

We know spending changes when you have more money. Here’s by how much.