Interactive Application Security Testing (IAST)
Interactive Application Security Testing (IAST) is a security scanning technique that collects information from inside an application during a DAST attack.
While DAST is running a local agent instruments the application and check which are the internal errors and problems that are raised, instead of getting results from "the outside". This allows to spot more vulnerabilities that are "invisible" to DAST.
This can be done against a Review App, as it is actually done by DAST.