Sorry for the delayed response.
Unfortunately, the answer is no.
Using ‘Test Model’ button you can only evaluate the performance of models created based on a specific data collection (collected in your account).
Other developers applications may be downloaded in the future via Google Play and App Store.
However, you cannot access other developers database at the moment.
P.S – We recommend sending technical questions like this one to our e-mail address: firstname.lastname@example.org.