Is it possible to use and sync Apple Watch with iPhone without Apple Watch app?

Is it possible to use an apple watch synced with iPhone without an apple watch app installed? It might sound crazy, but I would like to install the app, set up the Watch, and uninstall the app. Will it work and still be synced/connected?

[Re-Titled by Moderator]

Original Title: Apple Watch with iPhone, but without „Watch” app