Building an app destined for production is a daunting task, especially to replace existing legacy apps available for download in the App and Play Store. We could have pursued a typical release strategy—instead, we got creative with React Native.

We built a strangler-style architecture, a technique commonly reserved for web services, to release our greenfield React Native product user-by-user. The effect was some pretty unique and awesome advantages to how we built and tested our new app—but …