R4S Gateway is a free app developed by Ready For Sky for Android 9.0 devices. This app is designed to work with Bluetooth accessories that have the "R4S" logo, and it requires the installation of the "Ready For Sky" app on your smartphone or tablet.

To use R4S Gateway, simply download the app on your device and place it within 10 meters of the Bluetooth accessories. Once connected, you can control the accessories from your phone or tablet. The app is intended for use at home and is ideal for those who want to simplify their lives by controlling their accessories from their phone.

Overall, R4S Gateway is a great app for those who want to streamline their daily routines and control their Bluetooth accessories with ease. The app is user-friendly and easy to use, making it a top choice for anyone looking for a reliable lifestyle app.