For both iOS & Android.
Download "Expo" from the iOS App Store or Google Play Store. Login using reclojure/reclojure.
$ yarn global add expo-cli
$ yarn install
If you're into emacs:
M-x cider-jack-in-cljs
and when prompted for the REPL type, enter shadow and when prompted
for the app type enter :app.
Any other editor:
$ shadow-cljs watch app
Then to load the app and start Metro (it'll start it in a separate tab of your terminal):
$ expo-cli start --lan -c
You can then press i to launch on iOS simulator, or a to launch on (an open) android emulator
$ shadow-cljs release app
$ expo-cli build:android
$ expo-cli build:ios