POP, an app that lets developers quickly turn paper sketches into prototypes for mobile apps, has raised an angel round of $700,000 from ZPark, Golden Gate Ventures, 500 Startups (which POP participated in last year) , and other investors. POP, which launched for iPhone first, also released a new version that can be used to create apps for iPads, Android devices, and desktop as well.
Created by Taipei-based startup Woomoo Inc., POP was launched in November 2012. Since then, it has signed up 150,000 users, including designers at Facebook, Google, Dropbox, Evernote, and Twitter, and been used to create 1.5 million sketches, founder Ben Lin tells TechCrunch.
The aim of the first version of the app was to make prototyping as simple as possible. To use POP, developers simply sketched their app’s wireframe and took a photo of it. POP…
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