It's a set of tools and frameworks that make it convenient to use the Gambit Scheme compiler to develop apps for several platforms.

There are a variety of reasons that someone might choose it over Clojure or ClojureScript:

- they like Scheme better than Clojure

- they like the frameworks in LambdaNative better than the libraries available for Clojure

- they like the toolchain used with LambdaNative better than the toolchain around Clojure (both toolchains are kind of baroque compared to, say, Lispworks or ClozureCL)

- they want to build for a platform (such as iOS) where Gambit provides a convenient solution and Clojure doesn't

- they want to deliver apps to more platforms than Clojure currently supports

- they want to deliver compiled binaries that don't need a JVM or javascript VM to run