diff --git a/app/src/main/java/pl/szczodrzynski/edziennik/api/v2/librus/Librus.kt b/app/src/main/java/pl/szczodrzynski/edziennik/api/v2/librus/Librus.kt
index 667683c1..d9cf3662 100644
--- a/app/src/main/java/pl/szczodrzynski/edziennik/api/v2/librus/Librus.kt
+++ b/app/src/main/java/pl/szczodrzynski/edziennik/api/v2/librus/Librus.kt
@@ -13,6 +13,7 @@ import pl.szczodrzynski.edziennik.api.v2.interfaces.EdziennikInterface
 import pl.szczodrzynski.edziennik.api.v2.librus.data.LibrusData
 import pl.szczodrzynski.edziennik.api.v2.librus.login.LibrusLogin
 import pl.szczodrzynski.edziennik.api.v2.librusLoginMethods
+import pl.szczodrzynski.edziennik.api.v2.mobidziennik.MobidziennikFeatures
 import pl.szczodrzynski.edziennik.api.v2.models.ApiError
 import pl.szczodrzynski.edziennik.api.v2.models.Feature
 import pl.szczodrzynski.edziennik.data.db.modules.api.*
@@ -63,14 +64,15 @@ class Librus(val app: App, val profile: Profile?, val loginStore: LoginStore, va
         data.targetEndpointIds.clear()
         data.targetLoginMethodIds.clear()
 
-        // get all endpoints for every feature, only if possible to login
+        // get all endpoints for every feature, only if possible to login and possible/necessary to sync
         for (featureId in featureIds) {
             LibrusFeatures.filter {
-                        it.featureId == featureId && possibleLoginMethods.containsAll(it.requiredLoginMethods)
-                    }
-                    .let {
-                        endpointList.addAll(it)
-                    }
+                it.featureId == featureId // feature ID matches
+                        && possibleLoginMethods.containsAll(it.requiredLoginMethods) // is possible to login
+                        && it.shouldSync?.invoke(profile, loginStore) ?: true // is necessary/possible to sync
+            }.let {
+                endpointList.addAll(it)
+            }
         }
 
         val timestamp = System.currentTimeMillis()
diff --git a/app/src/main/java/pl/szczodrzynski/edziennik/api/v2/mobidziennik/Mobidziennik.kt b/app/src/main/java/pl/szczodrzynski/edziennik/api/v2/mobidziennik/Mobidziennik.kt
index 123eba43..c8687faa 100644
--- a/app/src/main/java/pl/szczodrzynski/edziennik/api/v2/mobidziennik/Mobidziennik.kt
+++ b/app/src/main/java/pl/szczodrzynski/edziennik/api/v2/mobidziennik/Mobidziennik.kt
@@ -9,6 +9,7 @@ import pl.szczodrzynski.edziennik.App
 import pl.szczodrzynski.edziennik.api.v2.*
 import pl.szczodrzynski.edziennik.api.v2.interfaces.EdziennikCallback
 import pl.szczodrzynski.edziennik.api.v2.interfaces.EdziennikInterface
+import pl.szczodrzynski.edziennik.api.v2.librus.LibrusFeatures
 import pl.szczodrzynski.edziennik.api.v2.mobidziennik.data.MobidziennikData
 import pl.szczodrzynski.edziennik.api.v2.mobidziennik.login.MobidziennikLogin
 import pl.szczodrzynski.edziennik.api.v2.models.ApiError
@@ -64,14 +65,15 @@ class Mobidziennik(val app: App, val profile: Profile?, val loginStore: LoginSto
         data.targetEndpointIds.clear()
         data.targetLoginMethodIds.clear()
 
-        // get all endpoints for every feature, only if possible to login
+        // get all endpoints for every feature, only if possible to login and possible/necessary to sync
         for (featureId in featureIds) {
             MobidziennikFeatures.filter {
-                it.featureId == featureId && possibleLoginMethods.containsAll(it.requiredLoginMethods)
+                it.featureId == featureId // feature ID matches
+                        && possibleLoginMethods.containsAll(it.requiredLoginMethods) // is possible to login
+                        && it.shouldSync?.invoke(profile, loginStore) ?: true // is necessary/possible to sync
+            }.let {
+                endpointList.addAll(it)
             }
-                    .let {
-                        endpointList.addAll(it)
-                    }
         }
 
         val timestamp = System.currentTimeMillis()
diff --git a/app/src/main/java/pl/szczodrzynski/edziennik/api/v2/models/Feature.kt b/app/src/main/java/pl/szczodrzynski/edziennik/api/v2/models/Feature.kt
index b8d9b8a7..91ac6563 100644
--- a/app/src/main/java/pl/szczodrzynski/edziennik/api/v2/models/Feature.kt
+++ b/app/src/main/java/pl/szczodrzynski/edziennik/api/v2/models/Feature.kt
@@ -1,5 +1,8 @@
 package pl.szczodrzynski.edziennik.api.v2.models
 
+import pl.szczodrzynski.edziennik.data.db.modules.login.LoginStore
+import pl.szczodrzynski.edziennik.data.db.modules.profiles.Profile
+
 /**
  * A Endpoint descriptor class.
  *
@@ -20,4 +23,14 @@ data class Feature(
         val requiredLoginMethods: List<Int>
 ) {
     var priority = endpointIds.size
+    fun withPriority(priority: Int): Feature {
+        this.priority = priority
+        return this
+    }
+
+    var shouldSync: ((Profile?, LoginStore) -> Boolean)? = null
+    fun withShouldSync(shouldSync: ((Profile?, LoginStore) -> Boolean)?): Feature {
+        this.shouldSync = shouldSync
+        return this
+    }
 }
\ No newline at end of file
diff --git a/app/src/main/java/pl/szczodrzynski/edziennik/api/v2/template/Template.kt b/app/src/main/java/pl/szczodrzynski/edziennik/api/v2/template/Template.kt
index a703f73a..a639e65e 100644
--- a/app/src/main/java/pl/szczodrzynski/edziennik/api/v2/template/Template.kt
+++ b/app/src/main/java/pl/szczodrzynski/edziennik/api/v2/template/Template.kt
@@ -10,11 +10,13 @@ import pl.szczodrzynski.edziennik.api.v2.CODE_INTERNAL_LIBRUS_ACCOUNT_410
 import pl.szczodrzynski.edziennik.api.v2.LOGIN_METHOD_NOT_NEEDED
 import pl.szczodrzynski.edziennik.api.v2.interfaces.EdziennikCallback
 import pl.szczodrzynski.edziennik.api.v2.interfaces.EdziennikInterface
+import pl.szczodrzynski.edziennik.api.v2.librus.LibrusFeatures
 import pl.szczodrzynski.edziennik.api.v2.models.ApiError
 import pl.szczodrzynski.edziennik.api.v2.models.Feature
 import pl.szczodrzynski.edziennik.api.v2.template.data.TemplateData
 import pl.szczodrzynski.edziennik.api.v2.template.login.TemplateLogin
 import pl.szczodrzynski.edziennik.api.v2.templateLoginMethods
+import pl.szczodrzynski.edziennik.api.v2.vulcan.VulcanFeatures
 import pl.szczodrzynski.edziennik.data.db.modules.api.EndpointTimer
 import pl.szczodrzynski.edziennik.data.db.modules.api.SYNC_ALWAYS
 import pl.szczodrzynski.edziennik.data.db.modules.api.SYNC_NEVER
@@ -66,14 +68,15 @@ class Template(val app: App, val profile: Profile?, val loginStore: LoginStore,
         data.targetEndpointIds.clear()
         data.targetLoginMethodIds.clear()
 
-        // get all endpoints for every feature, only if possible to login
+        // get all endpoints for every feature, only if possible to login and possible/necessary to sync
         for (featureId in featureIds) {
-            TemplateFeatures.filter {
-                it.featureId == featureId && possibleLoginMethods.containsAll(it.requiredLoginMethods)
+            VulcanFeatures.filter {
+                it.featureId == featureId // feature ID matches
+                        && possibleLoginMethods.containsAll(it.requiredLoginMethods) // is possible to login
+                        && it.shouldSync?.invoke(profile, loginStore) ?: true // is necessary/possible to sync
+            }.let {
+                endpointList.addAll(it)
             }
-                    .let {
-                        endpointList.addAll(it)
-                    }
         }
 
         val timestamp = System.currentTimeMillis()
diff --git a/app/src/main/java/pl/szczodrzynski/edziennik/api/v2/vulcan/Vulcan.kt b/app/src/main/java/pl/szczodrzynski/edziennik/api/v2/vulcan/Vulcan.kt
index c88023e5..d5af284f 100644
--- a/app/src/main/java/pl/szczodrzynski/edziennik/api/v2/vulcan/Vulcan.kt
+++ b/app/src/main/java/pl/szczodrzynski/edziennik/api/v2/vulcan/Vulcan.kt
@@ -10,6 +10,7 @@ import pl.szczodrzynski.edziennik.api.v2.CODE_INTERNAL_LIBRUS_ACCOUNT_410
 import pl.szczodrzynski.edziennik.api.v2.LOGIN_METHOD_NOT_NEEDED
 import pl.szczodrzynski.edziennik.api.v2.interfaces.EdziennikCallback
 import pl.szczodrzynski.edziennik.api.v2.interfaces.EdziennikInterface
+import pl.szczodrzynski.edziennik.api.v2.librus.LibrusFeatures
 import pl.szczodrzynski.edziennik.api.v2.models.ApiError
 import pl.szczodrzynski.edziennik.api.v2.models.Feature
 import pl.szczodrzynski.edziennik.api.v2.vulcan.data.VulcanData
@@ -66,14 +67,15 @@ class Vulcan(val app: App, val profile: Profile?, val loginStore: LoginStore, va
         data.targetEndpointIds.clear()
         data.targetLoginMethodIds.clear()
 
-        // get all endpoints for every feature, only if possible to login
+        // get all endpoints for every feature, only if possible to login and possible/necessary to sync
         for (featureId in featureIds) {
             VulcanFeatures.filter {
-                it.featureId == featureId && possibleLoginMethods.containsAll(it.requiredLoginMethods)
+                it.featureId == featureId // feature ID matches
+                        && possibleLoginMethods.containsAll(it.requiredLoginMethods) // is possible to login
+                        && it.shouldSync?.invoke(profile, loginStore) ?: true // is necessary/possible to sync
+            }.let {
+                endpointList.addAll(it)
             }
-                    .let {
-                        endpointList.addAll(it)
-                    }
         }
 
         val timestamp = System.currentTimeMillis()