diff --git a/iOS_SDK/OneSignalSDK/Source/OSAttributedFocusTimeProcessor.m b/iOS_SDK/OneSignalSDK/Source/OSAttributedFocusTimeProcessor.m
index 5beb0464a..649d2468b 100644
--- a/iOS_SDK/OneSignalSDK/Source/OSAttributedFocusTimeProcessor.m
+++ b/iOS_SDK/OneSignalSDK/Source/OSAttributedFocusTimeProcessor.m
@@ -39,7 +39,6 @@ @implementation OSAttributedFocusTimeProcessor {
     NSTimer* restCallTimer;
 }
 
-static let ATTRIBUTED_MIN_SESSION_TIME_SEC = 1;
 static let DELAY_TIME = 30;
 
 - (instancetype)init {
@@ -48,10 +47,6 @@ - (instancetype)init {
     return self;
 }
 
-- (int)getMinSessionTime {
-    return ATTRIBUTED_MIN_SESSION_TIME_SEC;
-}
-
 - (NSString*)unsentActiveTimeUserDefaultsKey {
     return OSUD_UNSENT_ACTIVE_TIME_ATTRIBUTED;
 }
@@ -61,11 +56,8 @@ - (void)sendOnFocusCall:(OSFocusCallParams *)params {
     let totalTimeActive = unsentActive + params.timeElapsed;
     [OneSignalLog onesignalLog:ONE_S_LL_DEBUG
                      message:[NSString stringWithFormat:@"sendOnFocusCall attributed with totalTimeActive %f", totalTimeActive]];
-    
+
     [super saveUnsentActiveTime:totalTimeActive];
-    
-    [OneSignalLog onesignalLog:ONE_S_LL_DEBUG message:[NSString stringWithFormat:@"OSAttributedFocusTimeProcessor:sendSessionTime of %@", @(params.timeElapsed)]];
-    [OneSignalUserManagerImpl.sharedInstance sendSessionTime:@(params.timeElapsed)];
 
     [self sendOnFocusCallWithParams:params totalTimeActive:totalTimeActive];
 }
@@ -110,6 +102,9 @@ - (void)sendBackgroundAttributedSessionTimeWithNSTimer:(NSTimer*)timer {
 - (void)sendBackgroundAttributedSessionTimeWithParams:(OSFocusCallParams *)params withTotalTimeActive:(NSNumber*)totalTimeActive {
     [OneSignalLog onesignalLog:ONE_S_LL_DEBUG message:@"OSAttributedFocusTimeProcessor:sendBackgroundAttributedSessionTimeWithParams start"];
 
+    [OneSignalLog onesignalLog:ONE_S_LL_DEBUG message:[NSString stringWithFormat:@"OSAttributedFocusTimeProcessor:sendSessionTime of %@", totalTimeActive]];
+    [OneSignalUserManagerImpl.sharedInstance sendSessionTime:totalTimeActive];
+
     dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^{
         [OneSignal sendSessionEndOutcomes:totalTimeActive params:params onSuccess:^(NSDictionary *result) {
             [OneSignalLog onesignalLog:ONE_S_LL_DEBUG message:@"sendBackgroundAttributed succeed"];
diff --git a/iOS_SDK/OneSignalSDK/Source/OSBaseFocusTimeProcessor.h b/iOS_SDK/OneSignalSDK/Source/OSBaseFocusTimeProcessor.h
index 6f3bbe3d7..c3cd8269d 100644
--- a/iOS_SDK/OneSignalSDK/Source/OSBaseFocusTimeProcessor.h
+++ b/iOS_SDK/OneSignalSDK/Source/OSBaseFocusTimeProcessor.h
@@ -34,9 +34,7 @@
 
 @property (nonatomic, readonly) BOOL onFocusCallEnabled;
 
-- (int)getMinSessionTime;
 - (NSString*)unsentActiveTimeUserDefaultsKey;
-- (BOOL)hasMinSyncTime:(NSTimeInterval)activeTime;
 
 - (void)resetUnsentActiveTime;
 - (void)sendOnFocusCall:(OSFocusCallParams *)params;
diff --git a/iOS_SDK/OneSignalSDK/Source/OSBaseFocusTimeProcessor.m b/iOS_SDK/OneSignalSDK/Source/OSBaseFocusTimeProcessor.m
index 2fb3321a9..802071d47 100644
--- a/iOS_SDK/OneSignalSDK/Source/OSBaseFocusTimeProcessor.m
+++ b/iOS_SDK/OneSignalSDK/Source/OSBaseFocusTimeProcessor.m
@@ -33,17 +33,6 @@ @implementation OSBaseFocusTimeProcessor {
     NSNumber* unsentActiveTime;
 }
 
-// Must override
-- (int)getMinSessionTime {
-    @throw [NSException exceptionWithName:NSInternalInconsistencyException
-      reason:[NSString stringWithFormat:@"You must override %@ in a subclass", NSStringFromSelector(_cmd)] userInfo:nil];
-}
-
-- (BOOL)hasMinSyncTime:(NSTimeInterval)activeTime {
-    [OneSignalLog onesignalLog:ONE_S_LL_DEBUG message:[NSString stringWithFormat:@"OSBaseFocusTimeProcessor hasMinSyncTime getMinSessionTime: %d activeTime: %f", [self getMinSessionTime], activeTime]];
-    return activeTime >= [self getMinSessionTime];
-}
-
 - (void)resetUnsentActiveTime {
     unsentActiveTime = nil;
 }
diff --git a/iOS_SDK/OneSignalSDK/Source/OSUnattributedFocusTimeProcessor.m b/iOS_SDK/OneSignalSDK/Source/OSUnattributedFocusTimeProcessor.m
index 8aff9d922..714631131 100644
--- a/iOS_SDK/OneSignalSDK/Source/OSUnattributedFocusTimeProcessor.m
+++ b/iOS_SDK/OneSignalSDK/Source/OSUnattributedFocusTimeProcessor.m
@@ -36,9 +36,11 @@ @interface OneSignal ()
 + (void)sendSessionEndOutcomes:(NSNumber*)totalTimeActive params:(OSFocusCallParams *)params onSuccess:(OSResultSuccessBlock _Nonnull)successBlock onFailure:(OSFailureBlock _Nonnull)failureBlock;
 @end
 
-@implementation OSUnattributedFocusTimeProcessor
+@implementation OSUnattributedFocusTimeProcessor {
+    NSTimer* restCallTimer;
+}
 
-static let UNATTRIBUTED_MIN_SESSION_TIME_SEC = 60;
+static let DELAY_TIME = 30;
 
 - (instancetype)init {
     self = [super init];
@@ -46,10 +48,6 @@ - (instancetype)init {
     return self;
 }
 
-- (int)getMinSessionTime {
-    return UNATTRIBUTED_MIN_SESSION_TIME_SEC;
-}
-
 - (NSString*)unsentActiveTimeUserDefaultsKey {
     return OSUD_UNSENT_ACTIVE_TIME;
 }
@@ -57,14 +55,10 @@ - (NSString*)unsentActiveTimeUserDefaultsKey {
 - (void)sendOnFocusCall:(OSFocusCallParams *)params {
     let unsentActive = [super getUnsentActiveTime];
     let totalTimeActive = unsentActive + params.timeElapsed;
-    
+
     [OneSignalLog onesignalLog:ONE_S_LL_DEBUG message:[NSString stringWithFormat:@"sendOnFocusCall unattributed with totalTimeActive %f", totalTimeActive]];
-    
-    if (![super hasMinSyncTime:totalTimeActive]) {
-        [OneSignalLog onesignalLog:ONE_S_LL_DEBUG message:[NSString stringWithFormat:@"unattributed influence saveUnsentActiveTime %f", totalTimeActive]];
-        [super saveUnsentActiveTime:totalTimeActive];
-        return;
-    }
+
+    [super saveUnsentActiveTime:totalTimeActive];
 
     [self sendOnFocusCallWithParams:params totalTimeActive:totalTimeActive];
 }
@@ -72,31 +66,64 @@ - (void)sendOnFocusCall:(OSFocusCallParams *)params {
 - (void)sendUnsentActiveTime:(OSFocusCallParams *)params {
     let unsentActive = [super getUnsentActiveTime];
     [OneSignalLog onesignalLog:ONE_S_LL_DEBUG message:[NSString stringWithFormat:@"sendUnsentActiveTime unattributed with unsentActive %f", unsentActive]];
-    
+
     [self sendOnFocusCallWithParams:params totalTimeActive:unsentActive];
 }
 
 - (void)sendOnFocusCallWithParams:(OSFocusCallParams *)params totalTimeActive:(NSTimeInterval)totalTimeActive {
-    [OneSignalLog onesignalLog:ONE_S_LL_DEBUG message:[NSString stringWithFormat:@"OSUnattributedFocusTimeProcessor:sendSessionTime of %@", @(totalTimeActive)]];
-    [OneSignalUserManagerImpl.sharedInstance sendSessionTime:@(totalTimeActive)];
-    [super saveUnsentActiveTime:0];
-
+    if (totalTimeActive < 1) {
+        [OneSignalLog onesignalLog:ONE_S_LL_DEBUG message:[NSString stringWithFormat:@"sendSessionEndOutcomes not sending active time %f", totalTimeActive]];
+        return;
+    }
+    
     [OSBackgroundTaskManager beginBackgroundTask:SESSION_OUTCOMES_TASK];
+
+    if (params.onSessionEnded) {
+        [self sendBackgroundUnattributedSessionTimeWithParams:params withTotalTimeActive:@(totalTimeActive)];
+        return;
+    }
+
+    restCallTimer = [NSTimer
+        scheduledTimerWithTimeInterval:DELAY_TIME
+                               target:self
+                             selector:@selector(sendBackgroundUnattributedSessionTimeWithNSTimer:)
+                             userInfo:@{@"params": params, @"time": @(totalTimeActive)}
+                              repeats:false];
+}
+
+- (void)sendBackgroundUnattributedSessionTimeWithNSTimer:(NSTimer*)timer {
+    let userInfo = (NSDictionary<NSString*, id>*)timer.userInfo;
+    let params = (OSFocusCallParams*)userInfo[@"params"];
+    let totalTimeActive = (NSNumber*)userInfo[@"time"];
+    [self sendBackgroundUnattributedSessionTimeWithParams:params withTotalTimeActive:totalTimeActive];
+}
+
+- (void)sendBackgroundUnattributedSessionTimeWithParams:(OSFocusCallParams *)params withTotalTimeActive:(NSNumber*)totalTimeActive {
+    [OneSignalLog onesignalLog:ONE_S_LL_DEBUG message:@"OSUnattributedFocusTimeProcessor:sendBackgroundUnattributedSessionTimeWithParams start"];
+
+    [OneSignalLog onesignalLog:ONE_S_LL_DEBUG message:[NSString stringWithFormat:@"OSUnattributedFocusTimeProcessor:sendSessionTime of %@", totalTimeActive]];
+    [OneSignalUserManagerImpl.sharedInstance sendSessionTime:totalTimeActive];
+
     dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^{
-        [OneSignal sendSessionEndOutcomes:@(totalTimeActive) params:params onSuccess:^(NSDictionary *result) {
+        [OneSignal sendSessionEndOutcomes:totalTimeActive params:params onSuccess:^(NSDictionary *result) {
             [OneSignalLog onesignalLog:ONE_S_LL_DEBUG message:@"sendUnattributed session end outcomes succeed"];
+            [super saveUnsentActiveTime:0];
             [OSBackgroundTaskManager endBackgroundTask:SESSION_OUTCOMES_TASK];
         } onFailure:^(NSError *error) {
-            [OneSignalLog onesignalLog:ONE_S_LL_ERROR message:@"sendUnattributed session end outcomes failed"];
+            [OneSignalLog onesignalLog:ONE_S_LL_ERROR message:@"sendUnattributed session end outcomes failed, will retry on next open"];
             [OSBackgroundTaskManager endBackgroundTask:SESSION_OUTCOMES_TASK];
         }];
     });
 }
 
 - (void)cancelDelayedJob {
-    // No job to cancel, network call is made right away.
-}
+    if (!restCallTimer)
+        return;
 
+    [restCallTimer invalidate];
+    restCallTimer = nil;
+    [OSBackgroundTaskManager endBackgroundTask:SESSION_OUTCOMES_TASK];
+}
 
 @end