This app was built on a mac, asuming have latest xCode installed, xCode Command Line Tools and running on High Sierra or later. You might need to open the project in xCode and change Team under Signing to your own.
In order to build this app, you need to have both node, npm and watchman installed.
node -v
v8.11.3
npm -v
6.4.1
watchman -v
> 4.9.0
Run npm i
react-native run-ios