Case Study: Building a report communication tool powered by SDK, without touching SDK's code.

What Build a simple tool that allows WhatsApp users to subscribe to receive a daily / weekly / monthly report (via WhatsApp) of their data collected via Secure Data Kit. Why We're on a company retreat and wanted to take advantage of the rich set of APIs and Webhooks that are provided through our healthcare data platform, Secure Data Kit (SDK). SDK was designed as a platform that allows you to easily get data *into* and *out of* a system, and do some cool stuff with it along the way. Our core group of customers are in the global health space, working to defeat crazy diseases by collecting and analyzing data from the most remote places in the world. One of the most common challenges we hear from people who use SDK is that it's difficult for them to communicate effectively with their team in the field. Enter WhatsApp. WhatsApp is the most popular messaging app in the entire world (over 1 **billion** daily active users!), works on Androids and iPhones, smart phones and feature phones, *and* their API just conveniently became available via Twilio! This company retreat was the perfect opportunity to take advantage of this newly available technology and build something fun that can serve our customers. How Our goal was to see how much we could build with the minimum amount of coding. We're taking advantage of a handful of off the shelf technologies to make it easy to send a daily / weekly / monthly WhatsApp message to a variety of users. The diagram below shows how it works but here are a few of the technologies we're using:

• Secure Data Kit (SDK): The SDK platform heavily relies on APIs and webhooks to allow core functionality to be easily extended.

• Configurable Webforms: We're well known for building surveys and forms that can easily be deployed to iPhone and Android but we've only recently been able to deploy our surveys to the web. With this new functionality we're making it easy for WhatsApp users to subscribe to receive reports.
• APIs: The SDK platform can be accessed, and configured, via API these are programming interfaces that make interoperability and integration possible.
• Webhooks: A webhook is sort of like an API it's event driven and allows SDK to be configured to call another system's API when a particular event happens (e.g. when data is saved).

• Twilio: If you're not familiar with Twilio, you should be. It's one of the premier communications platforms around allowing companies like Standard Co to integrate SMS, phone calls, and other communication methods - like WhatsApp!
• WhatsApp: As mentioned above, WhatsApp is one of the most popular messaging platforms on the planet with over 1.5 BILLION users. It's a really popular platform for public health workers since it can be used on iPhone, Android, and Feature phones. WhatsApp does not allow direct integration with their system, however, they have a partnership with Twilio that makes it possible for us to send messages to our WhatsApp user base.