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Barratt introduced many of the crucial ideas that lie behind successful advertising and these were widely circulated in his day. He constantly stressed the importance of a strong and exclusive brand image for Pears and of emphasizing the product's availability through saturation campaigns. He also understood the importance of constantly reevaluating the market for changing tastes and mores, stating in 1907 that "tastes change, fashions change, and the advertiser has to change with them. An idea that was effective a generation ago would fall flat, stale, and unprofitable if presented to the public today. Not that the idea of today is always better than the older idea, but it is different – it hits the present taste." [15]

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recently removed the last features in our apps that were written with React Native .

We’ve received numerous questions regarding our usage or React Native and why we’ve stopped investing in it.

In this post, I hope to answer the majority of the questions we’ve received and give insight into:

I certainly won’t claim to be an expert on React Native. Others on our team have much more experience than I do, but I doubt they would claim to be experts either.

I’ll be speaking from our own experiences about what did and didn’t work in our specific situation. Whether React Native is right for your team/project is up to you, but hopefully this post will provide an additional useful datapoint to consider.

I also want to point out that these experiences and opinions are from the mobile-engineering team here at Udacity, and no one else. The thoughts here don’t reflect the opinions of any other teams using, or building content for, React or React Native.

The Team

First things first. What does our team look like? The size, experience, and organization of your team can have a real impact on the viability of React Native for your project.

Our mobile-engineering team is split across the iOS and Android platforms.

When introducing React Native:


Over the course of our ~18 months with React Native, both our iOS and Android teams grew in size.

The team saw a new PM take the helm.

We went transitioned through multiple designers design paradigms.

How comfortable was/is each team with Javascript and a React paradigm when introducing React Native?


The sole dev on the iOS team was quite comfortable jumping into React Native having had ample previous experience with Javascript and web development.

Today, three of four iOS devs are at least moderately comfortable working with Javascript React Native.


At the introduction of React Native, one of the two Android developers was comfortable with Javascript. The other (myself) had very little Javascript, React, or web background.

The additional Android developer that joined the team also has little Javascript or web experience.

The Apps

What do our apps do?

Our mobile apps aim to bring the Udacity learning experience to your mobile device. They support authentication, content discovery, program registration (and in some cases payment), and finally the consumption of learning materials across a variety of programs and content types.

The apps are also a testing ground for new, experimental features and initiatives aimed at improving the overall learning outcomes for our users.

When React Native was introduced, the apps were very close to feature equivalent.

As time has gone on, core experiences have stayed mostly equivalent but each team has also increased the number of “experiments” exclusive to one platform or the other.

Additionally, due to much greater international demand, initiatives such as localization and smaller apk size have becoming an increasing priority for the Android team. The Android team has also worked closely at times with teams in other locales for market specific features that are not a priority for iOS.

Size of the codebases

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