The Atlantic (@TheAtlantic) recently published an article on the growth of the Square mobile card reader service which included some interesting graphics.
First, an image showing the types of things purchased, and where, scaled by the volume of those types of purchases in each locale:

The author of the Atlantic article was exploring whether Square had any mainstream appeal or was just a hipster novelty. As he noted in the article:
I asked Square to make me a map of their transactions to see where they had users. The map you see at the top of the page shows one hour of transaction volume on a Friday afternoon. The size of the bubble represents the volume of the transactions while the different colors indicate the types of users that Square has.
The author also included a map showing one month of Square transactions, with each transaction represented by a tiny black dot. Here's how one month of Square usage appears:

Writing about why these adoption patterns matter, the author summarizes:
Square is exciting because its mobility and low up-front costs allow entirely different types of business to move money with credit cards. Individuals, freelancers, farmers, nursery owners, Etsy DIY types, and a whole bunch of other people can actually treat cards as cash.
I'd take this one step further and say that mobile, low cost payments are exciting in general, and mobile payments are a very big opportunity across the board. PayPal is doing some very interesting things to make the end-to-end mobile purchase process simpler for users and developers (click here to read my post on some recent PayPal sneak peeks of upcoming solutions to be officially launched in coming months).
It's a terribly exciting time to be a payments-savvy developer, isn't it?!?
Click here to read and leave your comments on the complete X.com post.
I am a big fan of Hacker News (@hackernewsbot) and Kale Davis' weekly email newsletter curating the best HN content.
I'm also pretty big on mobile development and payments, so when I saw an HN item titled "iPhone vs Android app sales: numbers from an indie developer" in a recent newsletter, I of course had to click through and give it a read.
The post author, a full time independent mobile app developer, posts some cold, hard statistics on his iPhone versus Android app sales numbers. His key finding:
Overall the android version of my app makes about 75% of its iPhone equivalent. This is significantly better than I expected.
It's better than he expected because according to conventional wisdom iPhone apps dramatically outsell Android apps. Apparently conventional wisdom is wrong, at least in this case.
I'd encourage you to read his full post, plus the many insightful comments in the HN reader discussion that ensued, and decide for yourself if developing a native iPhone app is sufficient in and of itself, or whether you shouldn't also provide an Android app, if not a mobile web app, too.
As for me, I intend to always make certain I have a solution available on the top platforms. I don't want to leave money on the table. And there's too much money coming from Android users these days to build iPhone-only solutions, in my opinion.
What's your experience with iPhone and Android sales? Please sound off via the comments on the complete X.com post.
Google has launched the first iteration of their new Google+ API, and it's built on REST, JSON, and OAuth.
The new API was announced on the Google+ Platform blog thusly:
Google+ gives users full control over their information, supporting everything from intimate conversations with family to public showcases and debates. This initial API release is focused on public data only — it lets you read information that people have shared publicly on Google+.
The announcement provides several example API calls, including getting a user's public profile and retrieving their most recent public posts. For more information on all of the API capabilities, click here to access the accompanying developer site including Google+ API documentation.

The announcement goes on to discuss how this first API release uses RESTful HTTP requests and JSON responses, standard payload formats, and OAuth 2 for secure access to user data such as which user is using the app. It also links to libraries for languages including Java, Python, PHP, Ruby, and more. Read the post for full details.
So what are developers saying about this first release? Honestly, many aren't terribly impressed with the limited functionality available in this release. Something's better than nothing, but by not allowing any access to information a user has marked as private to one or more of their Circles, Google has effectively neutered their API out of the gate. It seems clear that a future release of the API must include access to Circles for the API to be viable long term.
What do you think about the Google+ API? Useful web API goodness, or an irrelevant API for an also-ran social service?
Please leave a comment on the complete X.com post with your thoughts.
Stunning time lapse composite of ISS images as if flew over North and South America. Must watch!
PayPal gave the world a sneak peek this week of some of the new technologies and initiatives they'll be launching at next month's X.commerce Innovate conference.
As PayPal President Scott Thompson noted in his blog post:
PayPal is re-imagining money and making it work better for merchants and consumers – whatever device you’re on, wherever you are in the world, and however you prefer to pay (whether that’s cash, credit, or installments).
He went on to say:
We’re rolling out a one-stop shop for merchants to engage their customers directly during every part of the shopping lifecycle – generating demand from consumers through location-based offers, making payments accessible from any device (not just from the mobile phone), and offering more flexibility to customers even after they’ve checked out.
The blog announcement also included this teaser image:

but honestly I think this video from the preview event shows PayPal's new innovations better than any static image could:
You can read more about the sneak peek via this coverage from GigaOm (click here to read).
Click here to read the complete post on X.com including Bill’s plans for Innovate.
RunKeeper and the Health Graph API
- How to improve your lactate threshold http://t.co/8ADdjWN via @runkeeper #
- I love @runkeeper examples like this one http://t.co/ooCgJRZ in the @fastcompany "What's Next For The Check-In?" piece #
- Two of my favorite apps @evernote @runkeeper mentioned in the same article http://t.co/xysok4YU #
- Visual of logging @runkeeper activities to @evernote in this "If This Then That" article http://t.co/pUA4jxCE but where are the details? #
- From @bostoninnovation: @RunKeeper Races get new look, now over 20,000 races in 8,300 cities http://t.co/dyH6Oz0I (vids at end of article) #
- Can't wait to try out @kickstarter funded @zombiesrungame http://t.co/935VlHjQ (with @runkeeper integration, natch!) #
Wireless and mobility
- It's pretty neat to be able to look up a passing flight with FlightAware http://t.co/Yv6Tsr2X (via @lifehacker) #
- A bike crash may wipe your memory of an accident, but you might be able to fill in blanks with your GPS http://t.co/TAxFQd0h via @nytimes #
Big data
- Free @OReillyMedia ebook "Big Data Now" http://t.co/sHxW0QS (more at http://t.co/dvTqbH7) #
APIs and development
- "Dojo: The Definitive Guide" by @ptwobrussell is now free http://t.co/KSooACM (more on how/why here http://t.co/O1FekjC ) #
- Free @Apigee webinar, "Your API is not a website!", could be useful for anyone launching or operating a web API http://t.co/EPyFYAQ #
- Hitchhiker’s Guide to the Boston Tech Community http://t.co/GMAywUV by @robgo (via @sarahhodges) #
- From @rww: @Apigee adds OAuth to API modeling http://t.co/8XNdgzO #
- Ten papers every programmer should read at least twice: http://t.co/UshoEpM (very highly recommended) #
- Git is simpler than you think http://t.co/lTznE0Iz by @nfarina #
- Must-read for every web API provider: "The Six Pillars of Complete Developer Documentation" http://t.co/74jxPwC3 by @pamelafox #
- More great platform evangelism and developer advocacy tips from @pamelafox in her "Developer Support Handbook" http://t.co/saKnBDyP #
- New features in Java 7 http://t.co/LsDozKr6 via @radar #
Personal things
- Our blue eyed boy is spending his first night away from Mom, and she's handling it surprisingly well http://t.co/akyzjR0Y #
- My wife's latest @geekmomblog post, on the very cool Museum of Osteology: "No Bones About It" http://t.co/y1hvULs #
- How @Lanyrd went from Casablanca to conference circuit http://t.co/y17Uogb via @gigaom (I *love* their service, very handy) #
- The four tiers of Twitter users http://t.co/JD72yowd by @LizGannes for @AllThingsD #
- The headphone tip alone is worth the time to read this @lifehacker travel hacks article http://t.co/cSKnfmMF #
- Google Flight Search is my new favorite ticket finding tool http://t.co/Z50DNxcP via @lifehacker #
- Interview with WeatherSpark co-founder @jacobnorda on design and data issues http://t.co/PNf1rbqA (my go-to weather service lately) #
Running
- 5k with family, easing back into things. http://t.co/rMWpOhP #RunKeeper #
The best way I know to reflect on the tenth anniversary of 9/11 is to write about my personal experience.
My wife and I were living in the San Francisco Bay Area at the time. That particular day I was flying on United from SFO to Paris on business. I left the day before, September 10th, and was arriving into Paris when the first plane hit the towers in New York. No one at CDG knew of it yet; in fact, I heard nothing of it until arriving at my hotel, checking in, and getting to my room.
I had just reached the room when the hotel phone rang. Odd, I thought. When I answered, it was my wife, and she was crying. She simply said “Turn on the TV”. Then I saw what had happened.
The next few days were surreal. I guess that’s pretty much a shared experience for everyone, but especially for Americans wherever they might have been. This is what I wrote ten years ago about my time while stuck in France waiting for a flight back home:
While in France, I experienced tremendous compassion from everyone I encountered, no matter their nationality, religion, language, or creed.
The sense of common loss in Europe and elsewhere around the world was unbelievable, but also heartening, as I saw first hand just how united French people (and everyone else I came into contact with while in France) are with the United States. Europe and the entire world mourn with Americans. Two events in particular struck me as particularly poignant reminders that we are all in this together.
The Queen ordered the American anthem played during the changing of the guard at Buckingham Palace, which is the only time I believe that anything other than the British anthem has ever been played in history. Knowing how strongly proud and patriotic the British people are, this really hit me as a testament to the strength of their support for all of us. The barriers of nationality are completely dissolved in this tragedy.
On a more personal note for me, a Parisian waiter one night the week of 11 September was guessing that my friend and I were British (possibly because of my facility with the French language). When I told the waiter we were from the United States, he almost cried. He shook our hands and told us how much he was thinking of the US and how upset he was. After dinner, he followed us all the way to the door and shook our hands again and told us we’d be very welcome to come back again. He was almost crying then too. That is how it was with most every person I met while I was in Paris.
…
I am very glad to be home, but I will never forget what I experienced in Paris in the long, terrible days after the 11th. We are all in this together. God bless all of us as we work harder than ever to make this world a better place for everyone, everywhere.
Only later did I really understand how desperate my wife must have been that morning when she called me. She knew I was flying United, and she knew United planes were among those hijacked. No one knew, at that point, how many flights had been targeted. So, in a very real sense, she didn’t know if I was dead or alive until she reached me at the hotel.
I will never forget that, either.
RunKeeper and the Health Graph API
- Great advice for entrepreneurs http://t.co/CCw8mgG from @RunKeeper CEO @jjacobs22 (includes one of my favorite quotes from TR to boot!) #
- Baby Tooth, a Ruby wrapper for @RunKeeper @HealthGraphAPI http://t.co/coHYNdh #
- I love a good user testimonial! RT @ryanRneu: @RunKeeper is my homeboy http://t.co/8nW9VrZ #
Wireless and mobility
- Amazon’s Kindle Tablet Is Very Real (and Android-based) http://t.co/0vbsXin #
APIs and development
- Sure Twitter's dangling an olive branch to developers http://t.co/nholjGm but do they really mean it? Actions speak loudly, Mr. Dorsey #
- Time for an upgrade, emacs fans: "Learn Vim Progressively" http://t.co/UjBr0cz (yes, I am a religious man when it comes to editors…) #
- I love the simplicity of this email-based follow-up system http://t.co/TuY1smA #
Personal things
- My wife just said "When you injure yourself, please call 911, ok?" to which our 16 month old responded "OK!" #
- My 7yr old "Hey, they have a Banana Republic!". Followed shortly after by "What *is* Banana Republic?" #
- Revisiting "Employee Equity: How Much?" via @fredwilson http://t.co/tsaYkz2 #
- My favorite new way to use @bufferapp is via keyboard shortcut http://t.co/4Zmkl00 #
- Potential trolls would be obvious if everyone else backed "The Patent Pledge" http://t.co/EKMqsKn #
- 45 years of Star Trek http://t.co/LR8j70O via @mashable (rock on, Gene!) #
- "Whither TechCrunch?" http://t.co/6qnnOgc by @fredwilson nicely sums up my thoughts on the TC-AOL-HuffPo shenanigans #
- The comments are worth reading in this startup early employee post http://t.co/53bAOZz #
- VC and investment 101: "What Are The Terms" (Part 1) http://t.co/JSr5Si5 #
- Ask Hacker News: How much did you earn as an employee from an exit? http://t.co/TtVdj0Y #
- I've got some *very* exciting news and I can't wait to tell the world…soon, very soon. #
Running
- Labor Day 16mi run. Cool and beautiful, a preview of fall! http://t.co/v9io2gF #RunKeeper #
- Easy 5mi after yesterday's long run. http://t.co/qC85xNj #RunKeeper #
- 4 cool morning miles of strategery. So many great things to do! http://t.co/QdeJMaZ #RunKeeper #
- 4×0.50mi Yasso 800s, paces 8:04, 8:18, 7:45, and 7:48 (avg 7:55). Target 8:00 (4hr marathon). http://t.co/dhyqnLE #RunKeeper #
- 18mi, first 12mi good, then rt knee reminded me of an old injury. http://t.co/0X2oyKs #RunKeeper #
RunKeeper and the Health Graph API
- Docs for the @HealthGraphAPI including Overview http://t.co/fWjHH3l and OAuth 2.0 Registration & Authorization info http://t.co/PiVc8D8 #
- In honor of Steve Jobs, fan runs Apple-shaped route #RunKeeper http://t.co/w8qgpLE #
- Perfect 10 out of 10 review of @RunKeeper http://t.co/mSvKs4E from @iphoneappstorm #
- Both @RunKeeper and partner Withings will demo at Health 2.0 Conf http://t.co/CdSgS26 #
- I *love* the title of this article: "Vail Resorts Upgrades RunKeeper-Like Ski & Snowboard App With Photos" http://t.co/UwVbYow #
- Good advice on boosting performance with the right warm-up http://t.co/A1ZjPvf from Jeff Gaudette via the @RunKeeper blog #

PayPal X Platform
- My @X_commerce blog is now at: http://t.co/EzdHYio @PayPalX @Magento @eBayDev #
- My latest @PayPalX blog post: "Google In-App Payments for (some) developers" http://t.co/j73iG8k (US bank requirement boggles me) #
APIs and development
- Free @OReillyMedia book "What is HTML5?" http://t.co/bDnYuA5 by @bdmclaughlin (via @radar) #
- New @Infochimps Geo API http://t.co/WStqyX5 brings together data from Geonames, NCDC, @Foursquare, & others. Details: http://t.co/Q1hpqAp #
- More on the @Infochimps Geo API http://t.co/S2KWGyt via their blog #
- Managing the data infrastructure behind hyperlocal http://t.co/DTEvHKU examines @Factual (via @streetfightmag) #
- Twitter queueing @Bufferapp hits one million tweets buffered http://t.co/ezBdeBT (nice job, guys!) #
Personal things
- Seek to get *more* from every opportunity http://t.co/VUUM0zZ (spot-on, Seth!) #
- The @InternetArchive has put together "Understanding 9/11" http://t.co/n2EmrPc with video and perspectives for research and remembrance #
- Good luck at Liquid Robotics, James! http://t.co/xkDPaaX (more on Gosling joining the ocean-based robotics startup http://t.co/digjptA ) #
- Early morning AA flight http://t.co/0zQCXjH #
- I get no end of kick out of seeing Windows error messages on airport monitors! http://t.co/b17P59g #
- Who at DFW thought this was attractive? http://t.co/z9MzztT #
- The Connecticut River, swollen with #Irene runoff http://t.co/TJ5vxps #
- New England Aquarium http://t.co/JqG4btR #
- Sailboats in Boston harbor. http://t.co/IdM8VpN #
- USS Constitution. http://t.co/74YJCl5 #
- Old North Church. http://t.co/jfkf8YB #
- MIT across the water while out on a run along the Esplanade http://t.co/8saQYV8 #
- Kayakers passing under Harvard Bridge http://t.co/UBLCJFg #
- My hotel is right by Nike Town and their Boston Marathon decor. Found it on a run. Perfect! http://t.co/jtxBvKO #
- Atlantic coast north of Boston http://t.co/OHMMTFv #
- I *love* how they converted the old DFW train stations into restaurants like Pappadeaux. http://t.co/PuxdpnO #
Running
- Love the design, very nice! RT @Route66Marathon: Medals revealed on facebook! http://t.co/RwvoaLu #
- Must do: Running in the Italian Dolomites via @iRunFar http://t.co/oHXi0aO #
- Sunny and nice recovery 5k after yesterday's long run. http://t.co/xQjmTGe #RunKeeper http://t.co/wXJMqUw #
- Cool 5k, windy (20+mph sustained). http://t.co/TaSoost #RunKeeper http://t.co/GIjYv5E #
- Easy 10k with stops to take sunrise pictures. I love running as the sun comes up! http://t.co/NArLCVV #RunKeeper http://t.co/rcZUfJL #
- Sunrise on my morning 10k. http://t.co/L6EBak5 #
- Another view of the sunrise looking past an old feed trough. http://t.co/XE3dl14 #
- Hilltop flower on the trail portion of my 10k. http://t.co/2oVMqqu #
- Fantastic, albeit muggy, easy 5k including a bit of hill work. http://t.co/tszUoxG #RunKeeper #
