Ambly is a ClojureScript REPL into embedded JavaScriptCore on iOS, macOS, and tvOS.
Ambly is designed for use when developing hybrid ClojureScript / native apps.
Ambly comprises a ClojureScript REPL implementation, along with Objective-C code interfacing JavaScriptCore.

Ambly™ is free and open source.
Ambly includes a command-line macOS binary which hosts JavaScriptCore and is useful for quickly checking ClojureScript behavior and performance in JavaScriptCore.
Launch the ambly binary on any Mac on your LAN:
$ ambly 2021-04-21 10:54:48.766 ambly[63695:4135199] Ambly 1.10.0
Then connect using ClojureScript's cljs.main, specifying -re ambly:
$ clj -Sdeps '{:deps {ambly/ambly {:mvn/version "1.10.0"}}}' -M -m cljs.main -re ambly -e '(+ 1 Math/PI)' -r a b c
Ambly binding to 10.0.1.76 for mDNS.
[1] ambly on My iMac
Connecting to ambly on My iMac ...
4.141592653589793
To quit, type: :cljs/quit
cljs.user=> *command-line-args*
("a" "b" "c")
cljs.user=> (map inc [1 2 3])
(2 3 4)