Median is a platform made for converting websites into hybrid webview or wrapper apps.
These are apps that utilize a mix of web and native mobile code, displaying the content of your website within a native "wrapper" (with native mobile elements layered on top).
Compared to other website to app solutions, Median is geared more towards developers, and businesses with development resources in-house.
It's best described as a low-code platform; you'll save time and require less coding than building from scratch, but some technical expertise is ideal.
This, along with a relatively high cost, makes it an option better suited for enterprises than lean, mid-sized brands.