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By co-founder of Instagram

Many of my friends recently shared infographic about “How Instagram Started” or “How Two Guys Made an App in 8 Weeks”. They sure made an app in 8 weeks but UX tricks and technology behind the app are more complex than we think. “Speed Matters” in UX. Slides from 2011 by Instagram co-founder Mike Krieger

 

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Law & Company

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Tech for Korea Ads Pilot

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The metrics used to analyze the profitability of subscription business

http://techcrunch.com/2015/10/05/easily-measure-the-profitability-of-your-consumer-subscription-business/

Summary:

  • Monthly Average Revenue Per User (ARPU)  = Subscription Revenue / Average Subscribers
  • Monthly Subscriber Churn Percent = Subscribers lost in month / Base of subscribers at beginning of month
  • Gross Margin Percent = Gross Profit (from subscribers) / Subscription Revenue
  • Subscriber Lifetime Value (LTV) = (Gross Margin Percent * Monthly Subscription ARPU) / Monthly Subscriber Churn Percent
  • Customer Acquisition Cost (CAC) = Sales & Marketing Expenses / Gross Customer Additions
  • Payback period (Breakeven points for each user) = Cumulative cash flow for average user
  • Subscriber Return on Investment (ROI) = LTV / Customer Acquisition Cost

Some metrics such as gross margin and customer acquisition cost are too generic, and can be applied to all types of businesses. Also, we should define / set the meaning of success, based on the past data of already successful subscription businesses.

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Insight behind the investment in Medium (by Ben Horowitz)

http://www.bhorowitz.com/mediumanda16z

Summary

  • Medium was founded by Ev Williams, co-funder of Blogger and Twitter.
  • Easy for beginners to combining all types of online contents such as tweets, gifs, graphics, and video along with text
  • its ultimate goal is to become a medium where independent authors can not only work with great tools and find their audience, but also earn a living thus finally fulfilling the true promise of blogging.
  • Etsy for independent designers, Medium for independent writers, SoundCloud for independent musicians, and ____ for independent _____?
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