diff --git a/src/freedombone-app-blog b/src/freedombone-app-blog
index 7044a442..e46a2df6 100755
--- a/src/freedombone-app-blog
+++ b/src/freedombone-app-blog
@@ -180,9 +180,10 @@ function reconfigure_blog {
 }
 
 function upgrade_blog {
-    if ! grep -Fxq "install_blog" $COMPLETION_FILE; then
-        return
+    if grep -q "FULLBLOG_DOMAIN_NAME" $CONFIGURATION_FILE; then
+        FULLBLOG_DOMAIN_NAME=$(grep "FULLBLOG_DOMAIN_NAME" $CONFIGURATION_FILE | awk -F '=' '{print $2}')
     fi
+
     function_check set_repo_commit
     set_repo_commit /var/www/$FULLBLOG_DOMAIN_NAME/htdocs "Blog commit" "$FULLBLOG_COMMIT" $FULLBLOG_REPO
 
diff --git a/src/freedombone-app-gnusocial b/src/freedombone-app-gnusocial
index d44bbfcb..e6d6ff08 100755
--- a/src/freedombone-app-gnusocial
+++ b/src/freedombone-app-gnusocial
@@ -222,8 +222,8 @@ function reconfigure_gnusocial {
 }
 
 function upgrade_gnusocial {
-    if ! grep -Fxq "install_gnusocial_main" $COMPLETION_FILE; then
-        return
+    if grep -q "GNU Social domain" $COMPLETION_FILE; then
+        MICROBLOG_DOMAIN_NAME=$(cat $COMPLETION_FILE | grep "GNU Social domain" | head -n 1 | awk -F ':' '{print $2}')
     fi
 
     # update to the next commit
diff --git a/src/freedombone-app-gogs b/src/freedombone-app-gogs
index a25358d2..7cd62344 100755
--- a/src/freedombone-app-gogs
+++ b/src/freedombone-app-gogs
@@ -183,10 +183,6 @@ function reconfigure_gogs {
 }
 
 function upgrade_gogs {
-    if ! grep -Fxq "install_gogs" $COMPLETION_FILE; then
-        return
-    fi
-
     if ! grep -q "Gogs version:" $COMPLETION_FILE; then
         return
     fi
diff --git a/src/freedombone-app-hubzilla b/src/freedombone-app-hubzilla
index fd91df15..36e4adee 100755
--- a/src/freedombone-app-hubzilla
+++ b/src/freedombone-app-hubzilla
@@ -250,9 +250,10 @@ function reconfigure_hubzilla {
 }
 
 function upgrade_hubzilla {
-    if ! grep -Fxq "install_hubzilla" $COMPLETION_FILE; then
-        return
+    if grep -q "HUBZILLA_DOMAIN_NAME" $CONFIGURATION_FILE; then
+        HUBZILLA_DOMAIN_NAME=$(grep "HUBZILLA_DOMAIN_NAME" $CONFIGURATION_FILE | awk -F '=' '{print $2}')
     fi
+
     HUBZILLA_PATH=/var/www/$HUBZILLA_DOMAIN_NAME/htdocs
 
     function_check set_repo_commit
diff --git a/src/freedombone-app-ipfs b/src/freedombone-app-ipfs
index 7685fb33..d8386590 100755
--- a/src/freedombone-app-ipfs
+++ b/src/freedombone-app-ipfs
@@ -54,7 +54,7 @@ function reconfigure_ipfs {
 }
 
 function upgrade_ipfs_go {
-    if ! grep -Fxq "install_ipfs_go" $COMPLETION_FILE; then
+    if [[ $(app_is_installed ipfs_go) == "0" ]]; then
         return
     fi
 
@@ -63,7 +63,7 @@ function upgrade_ipfs_go {
 }
 
 function upgrade_ipfs_js {
-    if ! grep -Fxq "install_ipfs_js" $COMPLETION_FILE; then
+    if [[ $(app_is_installed ipfs_js) == "0" ]]; then
         return
     fi
 
diff --git a/src/freedombone-app-irc b/src/freedombone-app-irc
index 65f5e15d..3759d2f8 100755
--- a/src/freedombone-app-irc
+++ b/src/freedombone-app-irc
@@ -186,7 +186,7 @@ function configure_firewall_for_irc {
 }
 
 function install_irc_server {
-    if grep -Fxq "install_irc_server" $COMPLETION_FILE; then
+    if [[ $(app_is_installed irc_server) == "1" ]]; then
         return
     fi
     apt-get -y install ngircd
@@ -293,7 +293,7 @@ function install_irc_server {
 }
 
 function install_irc_client {
-    if grep -Fxq "install_irc_client" $COMPLETION_FILE; then
+    if [[ $(app_is_installed irc_client) == "1" ]]; then
         return
     fi
     apt-get -y install irssi
diff --git a/src/freedombone-app-librevault b/src/freedombone-app-librevault
index ff8e8ac2..88e0208b 100755
--- a/src/freedombone-app-librevault
+++ b/src/freedombone-app-librevault
@@ -51,10 +51,6 @@ function reconfigure_librevault {
 }
 
 function upgrade_librevault {
-    if ! grep -Fxq "install_librevault" $COMPLETION_FILE; then
-        return
-    fi
-
     function_check set_repo_commit
 
     if [ -d $INSTALL_DIR/protobuf ]; then
diff --git a/src/freedombone-app-searx b/src/freedombone-app-searx
index 250b33bd..105a367f 100755
--- a/src/freedombone-app-searx
+++ b/src/freedombone-app-searx
@@ -51,10 +51,6 @@ function reconfigure_searx {
 }
 
 function upgrade_searx {
-    if ! grep -Fxq "install_searx" $COMPLETION_FILE; then
-        return
-    fi
-
     set_repo_commit $SEARX_PATH/searx "Search engine commit" "$SEARX_COMMIT" $SEARX_REPO
     if grep "Search engine key" $COMPLETION_FILE; then
         if [ -f ${SEARX_PATH}/searx/searx/settings.yml ]; then
diff --git a/src/freedombone-app-sip b/src/freedombone-app-sip
index f34d64ff..2ff498db 100755
--- a/src/freedombone-app-sip
+++ b/src/freedombone-app-sip
@@ -221,7 +221,7 @@ function update_sipwitch_daemon {
 }
 
 function install_sip_main {
-    if grep -Fxq "install_sip_main" $COMPLETION_FILE; then
+    if [[ $(app_is_installed sip_main) == "1" ]]; then
         return
     fi
 
@@ -301,11 +301,11 @@ function install_sip_main {
 
     function_check configure_firewall_for_sip4
     configure_firewall_for_sip4
-    echo 'install_sip_main' >> $COMPLETION_FILE
+    install_completed sip_main
 }
 
 function install_sip_turn {
-    if grep -Fxq "install_sip_turn" $COMPLETION_FILE; then
+    if [[ $(app_is_installed sip_turn) == "1" ]]; then
         return
     fi
 
@@ -442,7 +442,7 @@ function install_sip_turn {
 
     function_check configure_firewall_for_voip_turn
     configure_firewall_for_voip_turn
-    echo 'install_sip_turn' >> $COMPLETION_FILE
+    install_completed sip_turn
 }
 
 function install_sip {
diff --git a/src/freedombone-app-tox b/src/freedombone-app-tox
index 1b475b57..e7a32d13 100755
--- a/src/freedombone-app-tox
+++ b/src/freedombone-app-tox
@@ -105,9 +105,6 @@ function reconfigure_tox {
 }
 
 function upgrade_tox {
-    if ! grep -Fxq "install_tox" $COMPLETION_FILE; then
-        return
-    fi
     function_check set_repo_commit
     set_repo_commit $INSTALL_DIR/toxcore "toxcore commit" "$TOXCORE_COMMIT" $TOXCORE_REPO
 
@@ -316,7 +313,7 @@ function tox_avahi {
 }
 
 function install_tox_node {
-    if grep -Fxq "install_tox_node" $COMPLETION_FILE; then
+    if [[ $(app_is_installed tox_node) == "1" ]]; then
         return
     fi
 
@@ -355,18 +352,18 @@ function install_tox_node {
 
     function_check configure_firewall_for_tox
     configure_firewall_for_tox
-    echo 'install_tox_node' >> $COMPLETION_FILE
+    install_completed tox_node
 }
 
 function install_tox_client {
-    if grep -Fxq "install_tox_client" $COMPLETION_FILE; then
+    if [[ $(app_is_installed tox_client) == "1" ]]; then
         return
     fi
 
     function_check mesh_tox_client
     mesh_tox_client
 
-    echo 'install_tox_client' >> $COMPLETION_FILE
+    install_completed tox_client
 }
 
 function mesh_tox_node {
diff --git a/src/freedombone-app-webmail b/src/freedombone-app-webmail
index 4c7e55d1..a7332e5a 100755
--- a/src/freedombone-app-webmail
+++ b/src/freedombone-app-webmail
@@ -76,9 +76,6 @@ function reconfigure_webmail {
 }
 
 function upgrade_webmail {
-    if ! grep -Fxq "install_webmail" $COMPLETION_FILE; then
-        return
-    fi
     function_check set_repo_commit
     set_repo_commit $WEBMAIL_PATH "Webmail commit" "$WEBMAIL_COMMIT" $WEBMAIL_REPO
 }
diff --git a/src/freedombone-app-xmpp b/src/freedombone-app-xmpp
index ff1de050..53108357 100755
--- a/src/freedombone-app-xmpp
+++ b/src/freedombone-app-xmpp
@@ -117,9 +117,6 @@ function update_prosody_modules {
 }
 
 function upgrade_xmpp {
-    if ! grep -Fxq "install_xmpp_main" $COMPLETION_FILE; then
-        return
-    fi
     function_check update_prosody_modules
     update_prosody_modules
 }
@@ -259,7 +256,7 @@ function xmpp_email_headers {
 function install_xmpp_main {
     update_prosody_modules
 
-    if grep -Fxq "install_xmpp_main" $COMPLETION_FILE; then
+    if [[ $(app_is_installed xmpp_main) == "1" ]]; then
         return
     fi
     apt-get -y install lua-sec lua-bitop
@@ -431,11 +428,11 @@ function install_xmpp_main {
     configure_firewall_for_xmpp
     xmpp_email_headers
 
-    echo 'install_xmpp_main' >> $COMPLETION_FILE
+    install_completed xmpp_main
 }
 
 function install_xmpp_client {
-    if grep -Fxq "install_xmpp_client" $COMPLETION_FILE; then
+    if [[ $(app_is_installed xmpp_client) == "1" ]]; then
         return
     fi
     apt-get -y install profanity
@@ -498,7 +495,7 @@ function install_xmpp_client {
     chown -R $MY_USERNAME:$MY_USERNAME /home/$MY_USERNAME/.local
     chown -R $MY_USERNAME:$MY_USERNAME /home/$MY_USERNAME/.config
 
-    echo 'install_xmpp_client' >> $COMPLETION_FILE
+    install_completed xmpp_client
 }
 
 function install_xmpp {
diff --git a/src/freedombone-app-zeronet b/src/freedombone-app-zeronet
index 5f8e481a..0e716c4c 100755
--- a/src/freedombone-app-zeronet
+++ b/src/freedombone-app-zeronet
@@ -62,9 +62,6 @@ function reconfigure_zeronet {
 }
 
 function upgrade_zeronet {
-    if ! grep -Fxq "install_zeronet" $COMPLETION_FILE; then
-        return
-    fi
     function_check set_repo_commit
     set_repo_commit $MESH_INSTALL_DIR/zeronet "ZeroNet commit" "$ZERONET_COMMIT" $ZERONET_REPO
     set_repo_commit $MESH_INSTALL_DIR/zeronet/ZeroBlog "ZeroNet Blog commit" "$ZERONET_BLOG_COMMIT" $ZERONET_BLOG_REPO
@@ -159,7 +156,7 @@ function configure_firewall_for_zeronet {
 }
 
 function install_zeronet_blog {
-    if grep -Fxq "install_zeronet_blog" $COMPLETION_FILE; then
+    if [[ $(app_is_installed zeronet_blog) == "1" ]]; then
         return
     fi
 
@@ -256,10 +253,11 @@ function install_zeronet_blog {
         echo "ZeroNet Blog private key: $ZERONET_BLOG_PRIVATE_KEY" >> /home/$MY_USERNAME/README
     fi
 
-    echo 'install_zeronet_blog' >> $COMPLETION_FILE
+    install_completed zeronet_blog
 }
 
 function install_zeronet_mail {
+    if [[ $(app_is_installed zeronet_mail) == "1" ]]; then
     if grep -Fxq "install_zeronet_mail" $COMPLETION_FILE; then
         return
     fi
@@ -357,11 +355,11 @@ function install_zeronet_mail {
         echo $"ZeroNet Mail private key: $ZERONET_MAIL_PRIVATE_KEY" >> /home/$MY_USERNAME/README
     fi
 
-    echo 'install_zeronet_mail' >> $COMPLETION_FILE
+    install_completed zeronet_mail
 }
 
 function install_zeronet_forum {
-    if grep -Fxq "install_zeronet_forum" $COMPLETION_FILE; then
+    if [[ $(app_is_installed zeronet_forum) == "1" ]]; then
         return
     fi
 
@@ -452,11 +450,11 @@ function install_zeronet_forum {
         echo $"ZeroNet Forum private key: $ZERONET_FORUM_PRIVATE_KEY" >> /home/$MY_USERNAME/README
     fi
 
-    echo 'install_zeronet_forum' >> $COMPLETION_FILE
+    install_completed zeronet_forum
 }
 
 function install_zeronet_main {
-    if grep -Fxq "install_zeronet_main" $COMPLETION_FILE; then
+    if [[ $(app_is_installed zeronet_main) == "1" ]]; then
         return
     fi
 
@@ -467,7 +465,7 @@ function install_zeronet_main {
 
     function_check configure_firewall_for_zeronet
     configure_firewall_for_zeronet
-    echo 'install_zeronet_main' >> $COMPLETION_FILE
+    install_completed zeronet_main
 }
 
 function mesh_zeronet {