diff --git a/modules/bling/README.md b/modules/bling/README.md
index 4ed5ace..e568f4b 100644
--- a/modules/bling/README.md
+++ b/modules/bling/README.md
@@ -21,3 +21,20 @@ install:
     # - laptop # installs TLP and configures your system for laptop usage
     # - flatpaksync # allows synchronization of user-installed flatpaks. For more information, see the <bling-repo>/modules/bling/flatpaksync.md
 ```
+## Submodule documentation
+
+### `flatpaksync`
+
+The `flatpaksync` submodule can be used to synchronize user-installed flatpaks into a gist or traditional repository.
+
+Once the submodule is activated, users can create a file `$HOME/.config/flatpaksync/env` informing the repository that will be used to synchronize their apps in the POSIX standard:
+
+```bash
+GIST_REPO=<YOUR_REPO>
+```
+
+If the user has not yet installed their flatpaks, has already done the step above and has a `flatpak.list` file in the repository, simply use the `flatpakcheckout` binary to perform the installation and start the synchronization.
+
+**It is important to note that this submodule will NOT enable Flathub. If your applications come from there, you will need to enable Flathub before running it.**
+
+If the user has already configured their repository in the `$HOME/.config/flatpaksync/env` file but already has their flatpaks installed, simply create the `$HOME/.config/flatpaks.user.installed` file to start the synchronization.