If you leave your Roomba to do its job unattended — after all, that’s the whole point — from time to time it can get stuck in a corner or under furniture. If you can’t figure out where it went and you have a Wi-Fi connected model, you can call from the app to track it down.
To find your Roomba, open the iRobot HOME app on your phone and tap the three-dot menu button at the bottom right corner of the screen.
On the next screen, click the Find button. This will make your Roomba start playing a short song (assuming there is enough battery life left for that).