To make it more convenient for you to import reviews from 3rd party app, our new function will be released in the next quarter, so stay tuned.
For now, as a workaround, you can use our function, Import reviews from CSV File, in the latest update version 5.2 to achieve this task as following:
Firstly, you need to export reviews into CSV file from third party app.
Select products you intend to import from your file.
Due to the difference in format between our CSV file and 3rd party app, you will need to spend sometimes to align contents to match our CSV format properly.
Follow remaining steps to import reviews to a chosen product by checking article here.
If you need some more helps, please feel free to contact us via live chat, or email us at firstname.lastname@example.org