diff --git a/app/src/main/res/values-cs/strings.xml b/app/src/main/res/values-cs/strings.xml
index 9b4a5328..dd9a5c4d 100644
--- a/app/src/main/res/values-cs/strings.xml
+++ b/app/src/main/res/values-cs/strings.xml
@@ -88,6 +88,7 @@
   <string-array name="settings_sync_interval_names">
     <item>Pouze manuálně</item>
     <item>Každých 15 minut</item>
+    <item>Každých 30 minut</item>
     <item>Každou hodinu</item>
     <item>Každé 2 hodiny</item>
     <item>Každé 4 hodiny</item>
diff --git a/app/src/main/res/values-da/strings.xml b/app/src/main/res/values-da/strings.xml
index 7472f248..a1ad2cd2 100644
--- a/app/src/main/res/values-da/strings.xml
+++ b/app/src/main/res/values-da/strings.xml
@@ -75,6 +75,7 @@
   <string-array name="settings_sync_interval_names">
     <item>Kun manuelt</item>
     <item>Hver 15. minut</item>
+    <item>Hver 30. minut</item>
     <item>En gang i timen</item>
     <item>En gang hver 2. time</item>
     <item>En gang hver 4. time</item>
diff --git a/app/src/main/res/values-de/strings.xml b/app/src/main/res/values-de/strings.xml
index 2773e14b..524bfb77 100644
--- a/app/src/main/res/values-de/strings.xml
+++ b/app/src/main/res/values-de/strings.xml
@@ -122,6 +122,7 @@
     <string-array name="settings_sync_interval_names">
         <item>Nur manuell</item>
         <item>Alle 15 Minuten</item>
+        <item>Alle 30 Minuten</item>
         <item>Jede Stunde</item>
         <item>Alle 2 Stunde</item>
         <item>Alle 4 Stunde</item>
diff --git a/app/src/main/res/values-es/strings.xml b/app/src/main/res/values-es/strings.xml
index 7eba4331..6def4637 100644
--- a/app/src/main/res/values-es/strings.xml
+++ b/app/src/main/res/values-es/strings.xml
@@ -88,6 +88,7 @@
   <string-array name="settings_sync_interval_names">
     <item>Solo manualmente</item>
     <item>Cada 15 minutos</item>
+    <item>Cada 30 minutos</item>
     <item>Cada hora</item>
     <item>Cada 2 horas</item>
     <item>Cada 4 horas</item>
diff --git a/app/src/main/res/values-fr/strings.xml b/app/src/main/res/values-fr/strings.xml
index dc8183da..4893a4ac 100644
--- a/app/src/main/res/values-fr/strings.xml
+++ b/app/src/main/res/values-fr/strings.xml
@@ -88,6 +88,7 @@
     <string-array name="settings_sync_interval_names">
         <item>Manuellement</item>
         <item>Toutes les 15 minutes</item>
+        <item>Toutes les 30 minutes</item>
         <item>Toutes les heures</item>
         <item>Toutes les 2 heures</item>
         <item>Toutes les 4 heures</item>
diff --git a/app/src/main/res/values-hu/strings.xml b/app/src/main/res/values-hu/strings.xml
index f2fb867e..d2465b55 100644
--- a/app/src/main/res/values-hu/strings.xml
+++ b/app/src/main/res/values-hu/strings.xml
@@ -88,6 +88,7 @@
   <string-array name="settings_sync_interval_names">
     <item>Manuális</item>
     <item>15 percenként</item>
+    <item>30 percenként</item>
     <item>Óránként</item>
     <item>2 óránként</item>
     <item>4 óránként</item>
diff --git a/app/src/main/res/values-it/strings.xml b/app/src/main/res/values-it/strings.xml
index 79cc2046..024ba750 100644
--- a/app/src/main/res/values-it/strings.xml
+++ b/app/src/main/res/values-it/strings.xml
@@ -86,6 +86,7 @@
     <string-array name="settings_sync_interval_names">
         <item>Solo manualmente</item>
         <item>Ogni 15 minuti</item>
+        <item>Ogni 30 minuti</item>
         <item>Ogni ora</item>
         <item>Ogni 2 ore</item>
         <item>Ogni 4 ore</item>
diff --git a/app/src/main/res/values-ja/strings.xml b/app/src/main/res/values-ja/strings.xml
index c0fb9286..e9a4dae7 100644
--- a/app/src/main/res/values-ja/strings.xml
+++ b/app/src/main/res/values-ja/strings.xml
@@ -88,6 +88,7 @@
   <string-array name="settings_sync_interval_names">
     <item>手動のみ</item>
     <item>15 分ごと</item>
+    <item>30 分ごと</item>
     <item>1 時間ごと</item>
     <item>2 時間ごと</item>
     <item>4 時間ごと</item>
diff --git a/app/src/main/res/values-nb-rNO/strings.xml b/app/src/main/res/values-nb-rNO/strings.xml
index 751beec2..16caf555 100644
--- a/app/src/main/res/values-nb-rNO/strings.xml
+++ b/app/src/main/res/values-nb-rNO/strings.xml
@@ -240,6 +240,7 @@
     <string-array name="settings_sync_interval_names">
         <item>Bare manuelt</item>
         <item>Hvert 15. minutt</item>
+        <item>Hvert 30. minutt</item>
         <item>Hver time</item>
         <item>Annenhver time</item>
         <item>Hver 4. time</item>
diff --git a/app/src/main/res/values-nl/strings.xml b/app/src/main/res/values-nl/strings.xml
index dcb94ece..4dc87521 100644
--- a/app/src/main/res/values-nl/strings.xml
+++ b/app/src/main/res/values-nl/strings.xml
@@ -82,6 +82,7 @@
     <string-array name="settings_sync_interval_names">
         <item>Alleen handmatig</item>
         <item>Elke 15 minuten</item>
+        <item>Elke 30 minuten</item>
         <item>Elk uur</item>
         <item>Elke 2 uur</item>
         <item>Elke 4 uur</item>
diff --git a/app/src/main/res/values-pl/strings.xml b/app/src/main/res/values-pl/strings.xml
index a0104319..58e34e8d 100644
--- a/app/src/main/res/values-pl/strings.xml
+++ b/app/src/main/res/values-pl/strings.xml
@@ -216,6 +216,7 @@
     <string-array name="settings_sync_interval_names">
         <item>Tylko ręcznie</item>
         <item>Co 15 minut</item>
+        <item>Co 30 minut</item>
         <item>Co godzinę</item>
         <item>Co 2 godziny</item>
         <item>Co 4 godziny</item>
diff --git a/app/src/main/res/values-pt-rBR/strings.xml b/app/src/main/res/values-pt-rBR/strings.xml
index c616b817..47da6535 100644
--- a/app/src/main/res/values-pt-rBR/strings.xml
+++ b/app/src/main/res/values-pt-rBR/strings.xml
@@ -88,6 +88,7 @@
   <string-array name="settings_sync_interval_names">
     <item>Apenas manualmente</item>
     <item>A cada 15 minutos</item>
+    <item>A cada 30 minutos</item>
     <item>A cada hora</item>
     <item>A cada 2 horas</item>
     <item>A cada 4 horas</item>
diff --git a/app/src/main/res/values-pt/strings.xml b/app/src/main/res/values-pt/strings.xml
index d0c4691a..7831ffd9 100644
--- a/app/src/main/res/values-pt/strings.xml
+++ b/app/src/main/res/values-pt/strings.xml
@@ -24,6 +24,7 @@
   <string-array name="settings_sync_interval_names">
     <item>Apenas manualmente</item>
     <item>A cada 15 minutos</item>
+    <item>A cada 30 minutos</item>
     <item>A cada hora</item>
     <item>A cada 2 horas</item>
     <item>A cada 4 horas</item>
diff --git a/app/src/main/res/values-ru/strings.xml b/app/src/main/res/values-ru/strings.xml
index f2842fb7..908a6de0 100644
--- a/app/src/main/res/values-ru/strings.xml
+++ b/app/src/main/res/values-ru/strings.xml
@@ -25,6 +25,7 @@
     <string-array name="settings_sync_interval_names">
         <item>Вручную</item>
         <item>Каждые 15 минут</item>
+        <item>Каждые 30 минут</item>
         <item>Каждый час</item>
         <item>Каждые 2 часа</item>
         <item>Каждые 4 часа</item>
diff --git a/app/src/main/res/values-sr/strings.xml b/app/src/main/res/values-sr/strings.xml
index 969cd215..1bd524d6 100644
--- a/app/src/main/res/values-sr/strings.xml
+++ b/app/src/main/res/values-sr/strings.xml
@@ -88,6 +88,7 @@
   <string-array name="settings_sync_interval_names">
     <item>Само ручно</item>
     <item>Сваких 15 минута</item>
+    <item>Сваких 30 минута</item>
     <item>Сваког сата</item>
     <item>Свака 2 сата</item>
     <item>Свака 4 сата</item>
diff --git a/app/src/main/res/values-tr-rTR/strings.xml b/app/src/main/res/values-tr-rTR/strings.xml
index c6908b24..cd769500 100644
--- a/app/src/main/res/values-tr-rTR/strings.xml
+++ b/app/src/main/res/values-tr-rTR/strings.xml
@@ -75,6 +75,7 @@
     <string-array name="settings_sync_interval_names">
         <item>Sadece elle</item>
         <item>Her 15 dakikada bir</item>
+        <item>Her 30 dakikada bir</item>
         <item>Her saatte bir</item>
         <item>Her 2 saatte bir</item>
         <item>Her 4 saatte bir</item>
diff --git a/app/src/main/res/values-uk/strings.xml b/app/src/main/res/values-uk/strings.xml
index 0102e5fc..5f3bdeb1 100644
--- a/app/src/main/res/values-uk/strings.xml
+++ b/app/src/main/res/values-uk/strings.xml
@@ -24,6 +24,7 @@
   <string-array name="settings_sync_interval_names">
     <item>Лише вручну</item>
     <item>Кожних 15 хвилин</item>
+    <item>Кожних 30 хвилин</item>
     <item>Щогодини</item>
     <item>Кожних 2 години</item>
     <item>Кожних 4 години</item>
diff --git a/app/src/main/res/values/strings.xml b/app/src/main/res/values/strings.xml
index 62608623..68ba87d6 100644
--- a/app/src/main/res/values/strings.xml
+++ b/app/src/main/res/values/strings.xml
@@ -316,6 +316,7 @@
     <string-array name="settings_sync_interval_seconds" translateable="false">
         <item>-1</item>
         <item>900</item>
+        <item>1800</item>
         <item>3600</item>
         <item>7200</item>
         <item>14400</item>
@@ -324,6 +325,7 @@
     <string-array name="settings_sync_interval_names">
         <item>Only manually</item>
         <item>Every 15 minutes</item>
+        <item>Every 30 minutes</item>
         <item>Every hour</item>
         <item>Every 2 hours</item>
         <item>Every 4 hours</item>