Pyre is integrated with VSCode and Nuclide which allows you to catch your errors in real-time.
pyre init on the root of your repository, open the root in VSCode. Install the pyre-check extension from the extension marketplace, and pyre should start up automatically.
The extension's available here.
apm install atom-ide-ui && apm install ide-pyre in order to install pyre's Atom integration.
The pyre Atom package is available here.