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I want to calculate my retention by device ID. how do I do that? 

Hi ​@christina zou 

I haven’t seen Amplitude support retention by device ID in the chart UI. It’s either by user id or your group/account id ( if you have that instrumented ).

Moreover, measuring retention by device ID can come with caveats since they can be reset if it’s a mobile app or/and if the app assigns a new device ID after each install. This can impact your retention numbers quite a bit.


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