Detecting Trustworthy Domains

by Mike Vlad Cora

High quality, truthful, diverse and informative content is Flipboard’s #1 priority. Hand-picking trusted sources guarantees quality, but is very time consuming, and can potentially miss out on the multitude of excellent but smaller publishers. To address this problem, we’ve developed a machine learning (ML) system called the Domain Ranker. Its goal is to automatically distinguish authoritative domains from plagiarists, spammers and other low quality sources. It learns to predict how our editorial team would label a domain by analyzing the content and the signals generated by our users. The Domain Ranker scales our editorial thinking to a much larger amount of content than we could handle manually, ensuring high quality across all topics.…

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Clustering Similar Stories Using LDA

by Arnab Bhadury

There is more to a story than meets the eye, and some stories deserve to be presented from more than just one perspective. With Flipboard 4.0, we have released story roundups, a new feature that adds coverage from multiple sources to a story and provides you with a fuller picture of an event. …

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iOS Meetup

by Tim Johnsen

Flipboard was honored to host a meetup of the Palo Alto iOS Developers group about developing apps for watchOS 2 at our office in Palo Alto last week. Ben Morrow, writer of the Happy Watch blog and host of several Apple Watch hackathons, gave a talk deep diving into various aspects of watchOS 2. …

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Introducing PSync

by Zac Sweers

Here on the Android team at Flipboard, we have a lot of settings for users to adjust their experience. If you throw in internal settings, we have about 100 total preferences to manage. This is a lot of boilerplate to maintain, because preferences in Android have no built-in synchronization (unlike Resources). Our

class has a couple hundred lines of boilerplate fields at the top where we keep in-code mirrors to these preference values. This design is tedious, brittle, and requires a lot of overhead to keep in sync with XML. We developed a Gradle plugin called PSync to solve this problem. …

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Presenting BottomSheet

by Emil Sjölander

We are happy to introduce BottomSheet a new Open Source Android UI Component!

At Flipboard, we love building visually stunning and highly interactive UIs. When building these UIs, we tend to build them as fairly stand alone components. This makes it very easy for our developers to implement a similar interaction model and aesthetic across the whole product while working in parallel. BottomSheet is a UI component we developed to facilitate a new interaction model for saving an article to one of your magazines (otherwise known as “The Flip UI”). …

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Image Scaling using Deep Convolutional Neural Networks

by Norman Tasfi

This past summer I interned at Flipboard in Palo Alto, California. I worked on machine learning based problems, one of which was Image Upscaling. This post will show some preliminary results, discuss our model and its possible applications to Flipboard’s products…

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NSUserDefaults Performance Boost

by Tim Johnsen

Since iOS 8 was released we’ve noticed some sluggishness when using Flipboard in the simulator. When taking a trace with Instruments in normal use we noticed a significant amount of time was being spent in


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Introducing GoldenGate

by Emil Sjölander

You might not know it, but both Flipboard for iOS and Flipboard for Android make heavy use of web views. We use web views so we can ensure consistent designs for our partners’ articles across all platforms. Communication between native code and the JavaScript code running in a web view is something that is both tedious to implement as well as very bug prone as it’s mostly just string concatenation. Today we are releasing a library to make this task easier when developing Android applications which use web views.…

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60fps on the mobile web

by Michael Johnston

Flipboard launched during the dawn of the smartphone and tablet as a mobile-first experience, allowing us to rethink content layout principles from the web for a more elegant user experience on a variety of touchscreen form factors.

Now we’re coming full circle and bringing Flipboard to the web. Much of what we do at Flipboard has value independent of what device it’s consumed on: curating the best stories from all the topics, sources, and people that you care about most. Bringing our service to the web was always a logical extension.

As we began to tackle the project, we knew we wanted to adapt our thinking from our mobile experience to try and elevate content layout and interaction on the web. We wanted to match the polish and performance of our native apps…

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The Developer's Toolbox

by David Creemer

Simple, Secure, Repeatable

Most of us live a connected life by default. I have six computers and three mobile devices that hold bits and pieces of my work and personal lives. As a software engineer that may be on the high end, but surely it’s not uncommon to have a computer or two, a shell account or VPS, a phone, and perhaps a tablet too.

On each device, I need different parts of my digital life:

  1. accounts and passwords
  2. configuration files and settings
  3. applications
  4. documents, source code, and so on.

Upgrading or replacing devices and restoring my usual environment has always been painful, so I resolved to automate a large part of this process once and for all. …

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