diff --git a/scripts/_common.sh b/scripts/_common.sh
index 5e43880..0a4b037 100644
--- a/scripts/_common.sh
+++ b/scripts/_common.sh
@@ -9,6 +9,8 @@ pkg_dependencies="ffmpeg postgresql postgresql-contrib openssl g++ mailutils apt
 
 NODEJS_VERSION=16
 
+ynh_app_dependencies="prosody_ynh"
+
 #=================================================
 # PERSONAL HELPERS
 #=================================================
@@ -20,3 +22,96 @@ NODEJS_VERSION=16
 #=================================================
 # FUTURE OFFICIAL HELPERS
 #=================================================
+
+#!/bin/bash
+
+# Install other YunoHost apps
+#
+# usage: ynh_install_apps --apps="a_ynh b_ynh?domain=DOMAIN&path=PATH&admin=USER&language=fr&is_public=1&password=pass&port=666"
+# | arg: -a, --apps=     - apps to install
+#
+# Requires YunoHost version *.*.* or higher.
+ynh_install_apps() {
+	# Declare an array to define the options of this helper.
+	local legacy_args=a
+	local -A args_array=([a]=apps=)
+	local apps
+	# Manage arguments with getopts
+	ynh_handle_getopts_args "$@"
+
+	# Split the list of apps in an array
+	local apps_list=($(echo $apps | tr " " "\n"))
+	
+	# For each app
+	for i in "${apps_list[@]}"
+	do
+		# Retrieve the name of the app (part before _ynh)
+		local oneapp=$(echo "$i" | awk -F'[_ynh]' '{print $1}')
+		[ -z "$oneapp" ] && ynh_die --message="You didn't provided a YunoHost app to install"
+
+		# Retrieve the arguments of the app (part after ?)
+		local oneargument=$(echo "$i" | awk -F'[?]' '{print $2}')
+		[ ! -z "$oneargument" ] && oneargument="--args \"$oneargument\""
+
+		if ! yunohost app list | grep -q "$oneapp"
+		then
+			yunohost tools update
+			yunohost app install $oneapp $oneargument
+		else
+			yunohost tools update
+			yunohost app upgrade $oneapp $oneargument
+		fi
+		ynh_app_setting_set --app=$app --key=require_$oneapp --value="1"
+	done
+}
+
+# Remove other YunoHost apps
+#
+# apps will be removed only if no other apps need them.
+#
+# usage: ynh_remove_apps --apps="a_ynh b_ynh?domain=DOMAIN&path=PATH&admin=USER&language=fr&is_public=1&password=pass&port=666"
+# | arg: -a, --apps=     - apps to install
+#
+# Requires YunoHost version *.*.* or higher.
+ynh_remove_apps() {
+	# Declare an array to define the options of this helper.
+	local legacy_args=a
+	local -A args_array=([a]=app=)
+	local app
+	# Manage arguments with getopts
+	ynh_handle_getopts_args "$@"
+
+	# Split the list of apps in an array
+	local apps_list=($(echo $apps | tr " " "\n"))
+	
+	# For each app
+	for i in "${apps_list[@]}"
+	do
+		# Retrieve the name of the app (part before _ynh)
+		local oneapp=$(echo "$i" | awk -F'[_ynh]' '{print $1}')
+		[ -z "$oneapp" ] && ynh_die --message="You didn't provided a YunoHost app to remove"
+
+		ynh_app_setting_delete --app=$app --key=require_$oneapp
+
+		# List apps requiring $oneapp
+		local installed_apps=$(yunohost app list | grep -oP 'id: \K.*$')
+		local required_by=""
+		local installed_app_required_by=""
+		for installed_app in $installed_apps
+		do
+			local installed_app_required_by=$(ynh_app_setting_get --app=$installed_app --key="require_$oneapp")
+			if [[ $installed_app_required_by ]]
+			then
+				required_by="${installed_app_required_by}"
+			fi
+			installed_app_required_by=""
+		done
+
+		# If $oneapp is no more required
+		if [[ ! $required_by ]]
+		then
+			# Remove $oneapp
+			ynh_print_info --message="Removing of $oneapp"
+			yunohost app remove $oneapp --purge
+	done
+}
diff --git a/scripts/install b/scripts/install
index cae6d2c..b0898fe 100644
--- a/scripts/install
+++ b/scripts/install
@@ -85,22 +85,12 @@ ynh_script_progression --message="Installing dependencies..."
 ynh_install_nodejs --nodejs_version=$NODEJS_VERSION
 
 # Install dependencies
+ynh_install_apps --apps="$ynh_app_dependencies"
 ynh_exec_warn_less ynh_install_app_dependencies $pkg_dependencies
 
 # Install Yarn
 ynh_install_extra_app_dependencies --repo="deb https://dl.yarnpkg.com/debian/ stable main" --package="yarn" --key="https://dl.yarnpkg.com/debian/pubkey.gpg"
 
-if ! yunohost app list | grep -q "prosody"
-then
-	yunohost tools update
-	yunohost app install prosody
-else
-	yunohost tools update
-	yunohost app upgrade prosody
-fi
-
-ynh_app_setting_set --app=$app --key=require_prosody --value="1"
-
 #=================================================
 # CREATE DEDICATED USER
 #=================================================
diff --git a/scripts/remove b/scripts/remove
index e61e3c0..8db8662 100644
--- a/scripts/remove
+++ b/scripts/remove
@@ -109,31 +109,7 @@ ynh_script_progression --message="Removing dependencies..."
 # Remove metapackage and its dependencies
 ynh_remove_nodejs
 ynh_remove_app_dependencies
-
-# Remove Prosody
-ynh_app_setting_delete --app=$app --key=require_prosody
-
-# List apps requiring Prosody
-installed_apps=$(yunohost app list | grep -oP 'id: \K.*$')
-required_by=""
-installed_app_required_by=""
-for installed_app in $installed_apps
-do
-    installed_app_required_by=$(ynh_app_setting_get --app=$installed_app --key="require_prosody")
-    if [[ $installed_app_required_by ]]
-    then
-        required_by="${installed_app_required_by}"
-    fi
-    installed_app_required_by=""
-done
-
-# If Prosody is no more required
-if [[ ! $required_by ]]
-then
-    # Remove Prosody
-    ynh_print_info --message="Removing of Prosody"
-    yunohost app remove prosody --purge
-fi
+ynh_remove_apps --apps="$ynh_app_dependencies"
 
 #=================================================
 # CLOSE A PORT
diff --git a/scripts/restore b/scripts/restore
index d12ada6..c8ec5e4 100644
--- a/scripts/restore
+++ b/scripts/restore
@@ -97,19 +97,9 @@ ynh_script_progression --message="Reinstalling dependencies..."
 ynh_install_nodejs --nodejs_version=$NODEJS_VERSION
 
 # Install dependencies
+ynh_install_apps --apps="$ynh_app_dependencies"
 ynh_exec_warn_less ynh_install_app_dependencies $pkg_dependencies
 
-if ! yunohost app list | grep -q "prosody"
-then
-	yunohost tools update
-	yunohost app install prosody
-else
-	yunohost tools update
-	yunohost app upgrade prosody
-fi
-
-ynh_app_setting_set --app=$app --key=require_prosody --value="1"
-
 #=================================================
 # RESTORE THE POSTGRESQL DATABASE
 #=================================================
diff --git a/scripts/upgrade b/scripts/upgrade
index b55b0fa..a7488cb 100644
--- a/scripts/upgrade
+++ b/scripts/upgrade
@@ -215,22 +215,12 @@ ynh_script_progression --message="Upgrading dependencies..."
 ynh_install_nodejs --nodejs_version=$NODEJS_VERSION
 
 # Install dependencies
+ynh_install_apps --apps="$ynh_app_dependencies"
 ynh_exec_warn_less ynh_install_app_dependencies $pkg_dependencies
 
 # Install Yarn
 ynh_install_extra_app_dependencies --repo="deb https://dl.yarnpkg.com/debian/ stable main" --package="yarn" --key="https://dl.yarnpkg.com/debian/pubkey.gpg"
 
-if ! yunohost app list | grep -q "prosody"
-then
-	yunohost tools update
-	yunohost app install prosody
-else
-	yunohost tools update
-	yunohost app upgrade prosody
-fi
-
-ynh_app_setting_set --app=$app --key=require_prosody --value="1"
-
 #=================================================
 # SPECIFIC UPGRADE
 #=================================================