The description of this application from the submission and linked Github page isn't entirely clear. From watching the screencast, it appears to watch and trace a project, showing you in real-time what functions have been called, allowing you to study them by carefully injecting logging and (potentially?) other side-effecty code.
There's internal support for them in Frida, but it's not currently exposed to the public API (which CryptoShark uses). The main focus has been on proprietary apps so far, but it would definitely be a very welcome feature for a future version.