Merge pull request #1582 from NathanFallet/master

All-in-one alternative for macOS for beginners

Author: avsm

site/learn/tutorials/a_first_hour_with_ocaml.md

@@ -10,6 +10,8 @@ as described in [Up and Running](up_and_running.html).
 Alternatively, you may follow almost all of it by running OCaml in your browser
 using [TryOCaml](http://try.ocamlpro.com), with no installation required.
 
+On macOS/iOS/iPadOS, you can download this [all-in-one package on the App Store](https://apps.apple.com/app/ocaml-learn-code/id1547506826). It contains an editor side-by-side with an interactive top level, and is free and [open source](https://github.com/GroupeMINASTE/OCaml-iOS).
+
 ## Running OCaml programs
 
 To try small OCaml expressions, you can use an interactive top level, or REPL