diff --git a/FAQ.md b/FAQ.md
index 4c2e086a8b..7958ead5d2 100644
--- a/FAQ.md
+++ b/FAQ.md
@@ -885,6 +885,8 @@ It is inevitable that synchronizing messages will use battery power because it r
 
 Reconnecting to an email server will use extra battery power, so an unstable internet connection will result in extra battery usage.
 In this case you might want to synchronize periodically, for example each hour, instead of continuously.
+Note that polling frequently (more than every 30-60 minutes) will likely use more battery power than synchronizing always
+because connection to the server and comparing the local and remotes messages are expensive operations.
 
 Most of the battery usage, not considering viewing messages, is due to synchronization (receiving and sending) of messages.
 So, to reduce the battery usage, set the number of days to synchronize message for to a lower value,
diff --git a/app/src/main/res/values-cs-rCZ/strings.xml b/app/src/main/res/values-cs-rCZ/strings.xml
index 1e59eb777a..d92e5ef274 100644
--- a/app/src/main/res/values-cs-rCZ/strings.xml
+++ b/app/src/main/res/values-cs-rCZ/strings.xml
@@ -699,9 +699,12 @@
     <string name="title_crash_info_remark">Popište prosím co jste dělali když došlo k pádu aplikace:</string>
     <string-array name="pollIntervalNames">
         <item>Nepřetržitě</item>
-        <item>Každou hodinu</item>
-        <item>Každé 2 hodiny</item>
-        <item>Každé 4 hodiny</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>
+        <item>Every 8 hours</item>
     </string-array>
     <string-array name="sendDelayedNames">
         <item>Nepozdržovat</item>
diff --git a/app/src/main/res/values-da-rDK/strings.xml b/app/src/main/res/values-da-rDK/strings.xml
index 0c8f5fe442..f6bd36cc76 100644
--- a/app/src/main/res/values-da-rDK/strings.xml
+++ b/app/src/main/res/values-da-rDK/strings.xml
@@ -594,9 +594,12 @@
     <string name="title_crash_info_remark">Beskriv venligst hvad du foretog dig, da app\'en gik ned:</string>
     <string-array name="pollIntervalNames">
         <item>Altid</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>
+        <item>Every 8 hours</item>
     </string-array>
     <string-array name="sendDelayedNames">
         <item>Nej</item>
diff --git a/app/src/main/res/values-de-rDE/strings.xml b/app/src/main/res/values-de-rDE/strings.xml
index cf1e40274f..951f55db11 100644
--- a/app/src/main/res/values-de-rDE/strings.xml
+++ b/app/src/main/res/values-de-rDE/strings.xml
@@ -681,9 +681,12 @@ Konten und Identitäten (Aliase) können bei Bedarf auch manuell eingerichtet we
     <string name="title_crash_info_remark">Bitte beschreiben Sie, was Sie getan haben, während die App abgestürzt ist:</string>
     <string-array name="pollIntervalNames">
         <item>Immer</item>
-        <item>Stündlich</item>
-        <item>Alle zwei Stunden</item>
-        <item>Alle vier Stunden</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>
+        <item>Every 8 hours</item>
     </string-array>
     <string-array name="sendDelayedNames">
         <item>Nein</item>
diff --git a/app/src/main/res/values-es-rES/strings.xml b/app/src/main/res/values-es-rES/strings.xml
index 3da64dd548..ce1dccde3d 100644
--- a/app/src/main/res/values-es-rES/strings.xml
+++ b/app/src/main/res/values-es-rES/strings.xml
@@ -683,9 +683,12 @@
     <string name="title_crash_info_remark">Por favor describa que estaba haciendo cuando la app falló:</string>
     <string-array name="pollIntervalNames">
         <item>Siempre</item>
-        <item>Cada hora</item>
-        <item>Cada 2 horas</item>
-        <item>Cada 4 horas</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>
+        <item>Every 8 hours</item>
     </string-array>
     <string-array name="sendDelayedNames">
         <item>No</item>
diff --git a/app/src/main/res/values-fi-rFI/strings.xml b/app/src/main/res/values-fi-rFI/strings.xml
index 501e1de185..eeb6b088d5 100644
--- a/app/src/main/res/values-fi-rFI/strings.xml
+++ b/app/src/main/res/values-fi-rFI/strings.xml
@@ -683,9 +683,12 @@
     <string name="title_crash_info_remark">Kuvaile mitä olit tekemässä, kun sovellus kaatui:</string>
     <string-array name="pollIntervalNames">
         <item>Koko ajan</item>
-        <item>Tunnin välein</item>
-        <item>2 tunnin välein</item>
-        <item>4 tunnin välein</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>
+        <item>Every 8 hours</item>
     </string-array>
     <string-array name="sendDelayedNames">
         <item>Ei</item>
diff --git a/app/src/main/res/values-fr-rFR/strings.xml b/app/src/main/res/values-fr-rFR/strings.xml
index 8990b53392..f96622fd3b 100644
--- a/app/src/main/res/values-fr-rFR/strings.xml
+++ b/app/src/main/res/values-fr-rFR/strings.xml
@@ -683,9 +683,12 @@
     <string name="title_crash_info_remark">Veuillez décrire ce que vous faisiez lorsque l\'application s\'est arrêtée :</string>
     <string-array name="pollIntervalNames">
         <item>Toujours</item>
-        <item>Toutes les heures</item>
-        <item>Toutes les 2 heures</item>
-        <item>Toutes les 4 heures</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>
+        <item>Every 8 hours</item>
     </string-array>
     <string-array name="sendDelayedNames">
         <item>Non</item>
diff --git a/app/src/main/res/values-hr-rHR/strings.xml b/app/src/main/res/values-hr-rHR/strings.xml
index 6a69c03db9..6c1ae455f2 100644
--- a/app/src/main/res/values-hr-rHR/strings.xml
+++ b/app/src/main/res/values-hr-rHR/strings.xml
@@ -679,9 +679,12 @@ Ako je potrebno, računi i identiteti (aliasi) mogu se postaviti i ručno.    </
     <string name="title_crash_info_remark">Opišite što ste radili kada je aplikacija pala:</string>
     <string-array name="pollIntervalNames">
         <item>Uvijek</item>
-        <item>Svaki sat</item>
-        <item>Svaka 2 sata</item>
-        <item>Svaka 4 sata</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>
+        <item>Every 8 hours</item>
     </string-array>
     <string-array name="sendDelayedNames">
         <item>Ne</item>
diff --git a/app/src/main/res/values-it-rIT/strings.xml b/app/src/main/res/values-it-rIT/strings.xml
index b3da8739b0..6685b0fb8a 100644
--- a/app/src/main/res/values-it-rIT/strings.xml
+++ b/app/src/main/res/values-it-rIT/strings.xml
@@ -682,9 +682,12 @@
     <string name="title_crash_info_remark">Descrivi cosa stavi facendo quando l\'app si è interrotta:</string>
     <string-array name="pollIntervalNames">
         <item>Sempre</item>
-        <item>Ogni ora</item>
-        <item>Ogni 2 ore</item>
-        <item>Ogni 4 ore</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>
+        <item>Every 8 hours</item>
     </string-array>
     <string-array name="sendDelayedNames">
         <item>No</item>
diff --git a/app/src/main/res/values-nl-rNL/strings.xml b/app/src/main/res/values-nl-rNL/strings.xml
index aa61fa6d4a..52c58c3eaa 100644
--- a/app/src/main/res/values-nl-rNL/strings.xml
+++ b/app/src/main/res/values-nl-rNL/strings.xml
@@ -683,9 +683,12 @@
     <string name="title_crash_info_remark">Beschrijf alstublieft wat u aan het doen was toen de app crashte:</string>
     <string-array name="pollIntervalNames">
         <item>Altijd</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>
+        <item>Elke 8 uur</item>
     </string-array>
     <string-array name="sendDelayedNames">
         <item>Geen</item>
diff --git a/app/src/main/res/values-nn-rNO/strings.xml b/app/src/main/res/values-nn-rNO/strings.xml
index 5f45c939a4..9338bab264 100644
--- a/app/src/main/res/values-nn-rNO/strings.xml
+++ b/app/src/main/res/values-nn-rNO/strings.xml
@@ -683,9 +683,12 @@
     <string name="title_crash_info_remark">Beskriv hva du gjorde da appen krasjet:</string>
     <string-array name="pollIntervalNames">
         <item>Alltid</item>
-        <item>Hver time</item>
-        <item>Hver 2. time</item>
-        <item>Hver 4. time</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>
+        <item>Every 8 hours</item>
     </string-array>
     <string-array name="sendDelayedNames">
         <item>Nei</item>
diff --git a/app/src/main/res/values-no-rNO/strings.xml b/app/src/main/res/values-no-rNO/strings.xml
index 5f45c939a4..9338bab264 100644
--- a/app/src/main/res/values-no-rNO/strings.xml
+++ b/app/src/main/res/values-no-rNO/strings.xml
@@ -683,9 +683,12 @@
     <string name="title_crash_info_remark">Beskriv hva du gjorde da appen krasjet:</string>
     <string-array name="pollIntervalNames">
         <item>Alltid</item>
-        <item>Hver time</item>
-        <item>Hver 2. time</item>
-        <item>Hver 4. time</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>
+        <item>Every 8 hours</item>
     </string-array>
     <string-array name="sendDelayedNames">
         <item>Nei</item>
diff --git a/app/src/main/res/values-pl-rPL/strings.xml b/app/src/main/res/values-pl-rPL/strings.xml
index 8e413a59c3..05a252d617 100644
--- a/app/src/main/res/values-pl-rPL/strings.xml
+++ b/app/src/main/res/values-pl-rPL/strings.xml
@@ -686,9 +686,12 @@
     <string name="title_crash_info_remark">Opisz proszę, co robisz, w momencie awarii aplikacji:</string>
     <string-array name="pollIntervalNames">
         <item>Zawsze</item>
-        <item>Co godzinę</item>
-        <item>Co 2 godziny</item>
-        <item>Co 4 godziny</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>
+        <item>Every 8 hours</item>
     </string-array>
     <string-array name="sendDelayedNames">
         <item>Brak</item>
diff --git a/app/src/main/res/values-pt-rBR/strings.xml b/app/src/main/res/values-pt-rBR/strings.xml
index f76fa360ce..7932eb9bfa 100644
--- a/app/src/main/res/values-pt-rBR/strings.xml
+++ b/app/src/main/res/values-pt-rBR/strings.xml
@@ -680,9 +680,12 @@
     <string name="title_crash_info_remark">Por favor, descreva o que você estava fazendo quando o aplicativo falhou:</string>
     <string-array name="pollIntervalNames">
         <item>Sempre</item>
-        <item>A cada hora</item>
-        <item>A cada 2 horas</item>
-        <item>A cada 4 horas</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>
+        <item>Every 8 hours</item>
     </string-array>
     <string-array name="sendDelayedNames">
         <item>Não</item>
diff --git a/app/src/main/res/values-ro-rRO/strings.xml b/app/src/main/res/values-ro-rRO/strings.xml
index a5dcb2325a..76a259df4f 100644
--- a/app/src/main/res/values-ro-rRO/strings.xml
+++ b/app/src/main/res/values-ro-rRO/strings.xml
@@ -683,9 +683,12 @@
     <string name="title_crash_info_remark">Vă rugăm să descrieți ce făceați atunci când aplicația s-a oprit:</string>
     <string-array name="pollIntervalNames">
         <item>Permanent</item>
-        <item>La fiecare oră</item>
-        <item>La fiecare 2 ore</item>
-        <item>La fiecare 4 ore</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>
+        <item>Every 8 hours</item>
     </string-array>
     <string-array name="sendDelayedNames">
         <item>Fără</item>
diff --git a/app/src/main/res/values-ru-rRU/strings.xml b/app/src/main/res/values-ru-rRU/strings.xml
index 4e335f71b5..5fcc197492 100644
--- a/app/src/main/res/values-ru-rRU/strings.xml
+++ b/app/src/main/res/values-ru-rRU/strings.xml
@@ -652,9 +652,12 @@
     <string name="title_crash_info_remark">Пожалуйста, опишите, что Вы делали, когда приложение падало:</string>
     <string-array name="pollIntervalNames">
         <item>Непрерывно</item>
-        <item>Каждый час</item>
-        <item>Каждые 2 часа</item>
-        <item>Каждые 4 часа</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>
+        <item>Every 8 hours</item>
     </string-array>
     <string-array name="sendDelayedNames">
         <item>Нет</item>
diff --git a/app/src/main/res/values-sv-rSE/strings.xml b/app/src/main/res/values-sv-rSE/strings.xml
index 990dbfa56a..9a53951bfc 100644
--- a/app/src/main/res/values-sv-rSE/strings.xml
+++ b/app/src/main/res/values-sv-rSE/strings.xml
@@ -673,9 +673,12 @@
     <string name="title_crash_info_remark">Beskriv vad du gjorde när appen kraschade:</string>
     <string-array name="pollIntervalNames">
         <item>Alltid</item>
-        <item>Varje timme</item>
-        <item>Varannan timme</item>
-        <item>Var fjärde timme</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>
+        <item>Every 8 hours</item>
     </string-array>
     <string-array name="sendDelayedNames">
         <item>Nej</item>
diff --git a/app/src/main/res/values-tr-rTR/strings.xml b/app/src/main/res/values-tr-rTR/strings.xml
index 6a122f7549..05238f159e 100644
--- a/app/src/main/res/values-tr-rTR/strings.xml
+++ b/app/src/main/res/values-tr-rTR/strings.xml
@@ -639,9 +639,12 @@
     <string name="title_crash_info_remark">Lütfen uygulama çöktüğü sırada ne yaptığınızı açıklayın:</string>
     <string-array name="pollIntervalNames">
         <item>Her Zaman</item>
-        <item>Her Saat</item>
-        <item>2 saatte bir</item>
-        <item>Her 4 saatte bir</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>
+        <item>Every 8 hours</item>
     </string-array>
     <string-array name="sendDelayedNames">
         <item>Hayır</item>
diff --git a/app/src/main/res/values-zh-rCN/strings.xml b/app/src/main/res/values-zh-rCN/strings.xml
index ac2d8fc367..c4bba38cb4 100644
--- a/app/src/main/res/values-zh-rCN/strings.xml
+++ b/app/src/main/res/values-zh-rCN/strings.xml
@@ -674,9 +674,12 @@
     <string name="title_crash_info_remark">请描述应用崩溃时您的操作</string>
     <string-array name="pollIntervalNames">
         <item>总是</item>
-        <item>每小时</item>
-        <item>每 2 小时</item>
-        <item>每 4 小时</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>
+        <item>Every 8 hours</item>
     </string-array>
     <string-array name="sendDelayedNames">
         <item>否</item>
diff --git a/app/src/main/res/values/strings.xml b/app/src/main/res/values/strings.xml
index 1d8775a3e1..b37e37ccf7 100644
--- a/app/src/main/res/values/strings.xml
+++ b/app/src/main/res/values/strings.xml
@@ -775,16 +775,22 @@
 
     <string-array name="pollIntervalNames">
         <item>Always</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>
+        <item>Every 8 hours</item>
     </string-array>
 
     <integer-array name="pollIntervalValues" translatable="false">
         <item>0</item>
+        <item>15</item>
+        <item>30</item>
         <item>60</item>
         <item>120</item>
         <item>240</item>
+        <item>480</item>
     </integer-array>
 
     <string-array name="sendDelayedNames">