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If the other computer or device you want to connect to is also running the TeamViewer: Remote Control app, you need to use a TeamViewer account and add the target computer to it, because the app doesn't generate a Partner ID.
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The TeamViewer: Remote Control app allows you to connect to another computer or device using two ways: a Partner ID or a TeamViewer account. You can't connect to a computer or device that doesn't have the TeamViewer service installed and running.
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You can start a remote connection with devices or computers running the TeamViewer: Remote Control app or the TeamViewer desktop app. TeamViewer: Remote Control, app, Windows Requirements for connecting to another computer or device using the TeamViewer: Remote Control app
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