diff --git a/expo/features/app/settings/index.tsx b/expo/features/app/settings/index.tsx
index cfe9a541..1fcd0570 100644
--- a/expo/features/app/settings/index.tsx
+++ b/expo/features/app/settings/index.tsx
@@ -166,4 +166,4 @@ export function useCurrentUserUpdator() {
   );
 }
 
-export { SettingsUserConfigDefault };
+export { SettingsUserConfigDefault, SettingsAppConfig, SettingsUPFCConfig, SettingsUserConfig };
diff --git a/expo/features/app/settings/internals/SettingsProvider.tsx b/expo/features/app/settings/internals/SettingsProvider.tsx
index 0f30e1ba..0e71643b 100644
--- a/expo/features/app/settings/internals/SettingsProvider.tsx
+++ b/expo/features/app/settings/internals/SettingsProvider.tsx
@@ -2,16 +2,16 @@ import SettingsStore from '@hpapp/system/kvs/SettingsStore';
 import { createContext, useContext, useMemo, useState, useEffect, useCallback } from 'react';
 
 export interface SettingsContext {
-  store: Map<string, unknown>;
+  timestamp: number;
   settingsList: SettingsStore<unknown>[];
-  setValue: (key: string, value: unknown) => void;
+  refresh: () => void;
 }
 
 const contextObj = createContext<SettingsContext>({
-  store: new Map(),
+  timestamp: new Date().getTime(),
   settingsList: [],
   // eslint-disable-next-line @typescript-eslint/no-unused-vars
-  setValue: (_key: string, _value: unknown) => {}
+  refresh: () => {}
 });
 
 /**
@@ -29,31 +29,23 @@ export default function SettingsProvider({
   const Provider = contextObj.Provider;
   const [isLoading, setIsLoading] = useState<boolean>(true);
   // hold settings in memory rather than accessing actual storage behind settings list.
-  const [store, setStore] = useState<Map<string, unknown>>(new Map());
+  const [timestamp, setTimestamp] = useState<number>(new Date().getTime());
   useEffect(() => {
     // load all settings registered in Settings Store
     (async () => {
-      const values = await Promise.all(settings.map(async (s) => await s.load()));
-      const nextStore = new Map(store);
-      values.forEach((value, i) => {
-        const key = settings[i].storageKey;
-        nextStore.set(key, value);
-      });
-      setStore(nextStore);
+      await Promise.all(settings.map(async (s) => await s.load()));
       setIsLoading(false);
     })();
   }, [settings]);
   const value = useMemo(() => {
     return {
-      store,
+      timestamp,
       settingsList: settings,
-      setValue: async (key: string, value: unknown) => {
-        const nextStore = new Map(store);
-        nextStore.set(key, value);
-        setStore(nextStore);
+      refresh: () => {
+        setTimestamp(new Date().getTime());
       }
     };
-  }, [store, settings]);
+  }, [timestamp, settings]);
   if (isLoading) {
     return null;
   }
@@ -62,23 +54,19 @@ export default function SettingsProvider({
 
 export function useSettings<T>(settings: SettingsStore<T>): [T | undefined, (value: T | null) => Promise<void>] {
   const ctx = useContext(contextObj);
-  const value = ctx.store.get(settings.storageKey);
   const setValue = useCallback(
     async (value: T | null) => {
       if (value === null) {
         await settings.clear();
-        ctx.setValue(settings.storageKey, settings.options?.defaultValue);
+        ctx.refresh();
       } else {
         await settings.save(value);
-        ctx.setValue(settings.storageKey, value);
+        ctx.refresh();
       }
     },
-    [ctx.setValue, settings]
+    [ctx, ctx.refresh]
   );
-  if (!ctx.store.has(settings.storageKey)) {
-    throw new Error(`SettingsStore('${settings.storageKey}') is not initialized with context`);
-  }
-  return [value as T, setValue];
+  return [settings.current as T, setValue];
 }
 
 export function useAllSettings(): SettingsStore<unknown>[] {
diff --git a/expo/features/common/form/internals/CalendarDropdown.tsx b/expo/features/common/form/internals/CalendarDropdown.tsx
index 02b94ff3..c0c477e5 100644
--- a/expo/features/common/form/internals/CalendarDropdown.tsx
+++ b/expo/features/common/form/internals/CalendarDropdown.tsx
@@ -25,22 +25,22 @@ export default function CalendarDropdown({
   const [calendars, setCalendars] = useState<Calendar.Calendar[]>([]);
   useEffect(() => {
     (async () => {
-      let reminderGranted = true;
       const { granted } = await Calendar.requestCalendarPermissionsAsync();
-      if (Platform.OS === 'ios') {
-        const { granted } = await Calendar.requestRemindersPermissionsAsync();
-        reminderGranted = granted;
-      }
-      if (granted && reminderGranted) {
-        const calendars = await Calendar.getCalendarsAsync(Calendar.EntityTypes.EVENT);
-        // for Android, getEventsAsync return nothing if the calender is not visible so
-        // users have to select from only visible calendars.
-        if (Platform.OS === 'android') {
+      if (granted) {
+        if (Platform.OS === 'ios') {
+          const reminderPermission = await Calendar.requestRemindersPermissionsAsync();
+          if (reminderPermission.granted) {
+            const calendars = await Calendar.getCalendarsAsync(Calendar.EntityTypes.EVENT);
+            setCalendars(calendars.filter((c) => c.allowsModifications));
+            setIsRequsetingPermission(false);
+          }
+        } else if (Platform.OS === 'android') {
+          const calendars = await Calendar.getCalendarsAsync();
           setCalendars(calendars.filter((c) => c.isVisible === true && c.allowsModifications));
+          setIsRequsetingPermission(false);
         } else {
-          setCalendars(calendars.filter((c) => c.allowsModifications));
+          // no calendar support
         }
-        setIsRequsetingPermission(false);
       }
     })();
   }, []);
diff --git a/expo/features/devtool/DevtoolScreen.tsx b/expo/features/devtool/DevtoolScreen.tsx
index 68facf0e..2802a8c4 100644
--- a/expo/features/devtool/DevtoolScreen.tsx
+++ b/expo/features/devtool/DevtoolScreen.tsx
@@ -12,6 +12,7 @@ import { useEffect, useState } from 'react';
 import { ScrollView } from 'react-native';
 
 import DevtoolListItem from './internals/DevtoolListItem';
+import DevtoolListItemResetOnboardingFlow from './internals/DevtoolListItemResetOnboardingFlow';
 import DevtoolUserConfigForm from './internals/DevtoolUserConfigForm';
 
 export default defineScreen('/devtool/', function DevtoolScreen() {
@@ -60,7 +61,8 @@ export default defineScreen('/devtool/', function DevtoolScreen() {
         }
       />
       <Divider />
-
+      <DevtoolListItemResetOnboardingFlow />
+      <Divider />
       <ListItemClearCache />
       <Divider />
       <DevtoolUserConfigForm />
diff --git a/expo/features/devtool/internals/DevtoolListItemResetOnboardingFlow.tsx b/expo/features/devtool/internals/DevtoolListItemResetOnboardingFlow.tsx
new file mode 100644
index 00000000..705cd3b5
--- /dev/null
+++ b/expo/features/devtool/internals/DevtoolListItemResetOnboardingFlow.tsx
@@ -0,0 +1,33 @@
+import { SettingsAppConfig, SettingsUserConfig, SettingsUPFCConfig } from '@hpapp/features/app/settings';
+import { Text } from '@hpapp/features/common';
+import { clearCacheDir } from '@hpapp/system/uricache';
+import { ListItem } from '@rneui/themed';
+import { Image } from 'expo-image';
+import * as Updates from 'expo-updates';
+import Toast from 'react-native-root-toast';
+
+export default function DevtoolListItemResetOnboardingFlow() {
+  return (
+    <ListItem
+      onPress={async () => {
+        await Promise.all([
+          Image.clearDiskCache(),
+          Image.clearMemoryCache(),
+          SettingsAppConfig.clear(),
+          SettingsUserConfig.clear(),
+          SettingsUPFCConfig.clear(),
+          clearCacheDir()
+        ]);
+        if (__DEV__) {
+          Toast.show('All data cleared, please reload the app manually', { duration: Toast.durations.SHORT });
+        } else {
+          Updates.reloadAsync();
+        }
+      }}
+    >
+      <ListItem.Content>
+        <Text>Reset Onboarding Flow</Text>
+      </ListItem.Content>
+    </ListItem>
+  );
+}
diff --git a/expo/features/onboarding/OnboardingScreen.tsx b/expo/features/onboarding/OnboardingScreen.tsx
index 0471fbe9..ac5d23b4 100644
--- a/expo/features/onboarding/OnboardingScreen.tsx
+++ b/expo/features/onboarding/OnboardingScreen.tsx
@@ -1,16 +1,13 @@
-import { useUserConfig, useUserConfigUpdator } from '@hpapp/features/app/settings';
-import { defineScreen, useNavigation } from '@hpapp/features/common/stack';
-import HomeScreen from '@hpapp/features/home/HomeScreen';
+import { defineScreen } from '@hpapp/features/common/stack';
 import { t } from '@hpapp/system/i18n';
 
 import OnboardingStepFollowMembers from './internals/OnboardingStepFollowMembers';
 import OnboardingStepProvider from './internals/OnboardingStepProvider';
-import OnboardinStepUPCSettings from './internals/OnboardingStepUPFCSettings';
+import OnboardingStepUPCSettings from './internals/OnboardingStepUPFCSettings';
+import useCompleteOnboarding from './internals/useCompleteOnboarding';
 
 export default defineScreen('/onboarding/', function OnboardingScreen() {
-  const navigation = useNavigation();
-  const userConfig = useUserConfig();
-  const userConfigUpdate = useUserConfigUpdator();
+  const completeOnboarding = useCompleteOnboarding();
   return (
     <OnboardingStepProvider
       firstStep="followMembers"
@@ -35,10 +32,11 @@ export default defineScreen('/onboarding/', function OnboardingScreen() {
               t('You can skip this step to complete the initial settings.')
             ].join(' '),
             element: (
-              <OnboardinStepUPCSettings
+              <OnboardingStepUPCSettings
                 onSave={() => {
-                  userConfigUpdate({ ...userConfig!, completeOnboarding: true });
-                  navigation.replace(HomeScreen);
+                  completeOnboarding({
+                    set_upfc: true
+                  });
                 }}
               />
             )
diff --git a/expo/features/onboarding/internals/OnboardingStepProvider.tsx b/expo/features/onboarding/internals/OnboardingStepProvider.tsx
index e43361d8..160127eb 100644
--- a/expo/features/onboarding/internals/OnboardingStepProvider.tsx
+++ b/expo/features/onboarding/internals/OnboardingStepProvider.tsx
@@ -1,10 +1,9 @@
-import { useUserConfig, useUserConfigUpdator } from '@hpapp/features/app/settings';
-import { useNavigation, useScreenTitle } from '@hpapp/features/common/stack';
-import HomeScreen from '@hpapp/features/home/HomeScreen';
+import { useScreenTitle } from '@hpapp/features/common/stack';
 import { t } from '@hpapp/system/i18n';
 import { useState } from 'react';
 
 import OnboardingStep, { OnboardingStepProps } from './OnboardingStep';
+import useCompleteOnboarding from './useCompleteOnboarding';
 
 export type OnboardingStepContainerProps = {
   firstStep: string;
@@ -18,9 +17,7 @@ export type OnboardingStepContainerProps = {
 
 export default function OnboardingStepContainer({ firstStep, steps }: OnboardingStepContainerProps) {
   useScreenTitle(t('Welcome to Hello!Fan App!'));
-  const navigation = useNavigation();
-  const userConfig = useUserConfig();
-  const userConfigUpdate = useUserConfigUpdator();
+  const completeOnboarding = useCompleteOnboarding();
   const [stack, setStack] = useState([firstStep]);
   return (
     <>
@@ -35,8 +32,7 @@ export default function OnboardingStepContainer({ firstStep, steps }: Onboarding
                 setStack((prev) => [next, ...prev]);
               }
             : () => {
-                userConfigUpdate({ ...userConfig!, completeOnboarding: true });
-                navigation.replace(HomeScreen);
+                completeOnboarding();
               };
           const onBackPress = stack.length > 1 ? () => setStack((prev) => prev.slice(1)) : undefined;
           const nextText = next ? t('Next') : t('Complete');
diff --git a/expo/features/onboarding/internals/useCompleteOnboarding.ts b/expo/features/onboarding/internals/useCompleteOnboarding.ts
new file mode 100644
index 00000000..5abe3fbd
--- /dev/null
+++ b/expo/features/onboarding/internals/useCompleteOnboarding.ts
@@ -0,0 +1,17 @@
+import { useUserConfig, useUserConfigUpdator } from '@hpapp/features/app/settings';
+import { useNavigation } from '@hpapp/features/common/stack';
+import HomeScreen from '@hpapp/features/home/HomeScreen';
+import { logEvent } from '@hpapp/system/firebase';
+import * as logging from 'system/logging';
+
+export default function useCompleteOnboarding() {
+  const navigation = useNavigation();
+  const userConfig = useUserConfig();
+  const userConfigUpdate = useUserConfigUpdator();
+  return function completeOnboarding(params?: Record<string, any>) {
+    userConfigUpdate({ ...userConfig!, completeOnboarding: true });
+    logging.Info('features.onboarding.useCompleteOnboarding', 'onboarding completed', params);
+    logEvent('onboarding_complete', params);
+    navigation.replace(HomeScreen);
+  };
+}
diff --git a/expo/features/upfc/internals/settings/UPFCSettingsForm.tsx b/expo/features/upfc/internals/settings/UPFCSettingsForm.tsx
index 27c7b4a4..8d779e4e 100644
--- a/expo/features/upfc/internals/settings/UPFCSettingsForm.tsx
+++ b/expo/features/upfc/internals/settings/UPFCSettingsForm.tsx
@@ -72,13 +72,7 @@ export default function UPFCSettingsForm({ onSave }: UPFCSettingsFormProps) {
           }
           lastAuthenticatedAt = new Date().getTime() / 1000;
         }
-        Toast.show(t('Saved Successfully!'), {
-          position: Toast.positions.BOTTOM,
-          duration: Toast.durations.SHORT,
-          textColor: succsesContrast,
-          backgroundColor: successColor
-        });
-        updateConfig({
+        await updateConfig({
           hpUsername,
           hpPassword,
           mlUsername,
@@ -87,13 +81,19 @@ export default function UPFCSettingsForm({ onSave }: UPFCSettingsFormProps) {
           eventPrefix,
           lastAuthenticatedAt
         });
+        Toast.show(t('Saved Successfully!'), {
+          position: Toast.positions.BOTTOM,
+          duration: Toast.durations.SHORT,
+          textColor: succsesContrast,
+          backgroundColor: successColor
+        });
+        onSave && onSave();
       } catch (e) {
         setLastError(e as Error);
         return;
       } finally {
         setIsSaving(false);
       }
-      onSave && onSave();
     })();
   }, [updateConfig, hpUsername, hpPassword, mlUsername, mlPassword, calendarId, eventPrefix]);
   return (
diff --git a/expo/system/kvs/SettingsStore.ts b/expo/system/kvs/SettingsStore.ts
index 4c4371f5..6c3e4514 100644
--- a/expo/system/kvs/SettingsStore.ts
+++ b/expo/system/kvs/SettingsStore.ts
@@ -1,4 +1,5 @@
 import { Platform } from 'react-native';
+import * as logging from 'system/logging';
 
 import JSONStore from './JSONStore';
 import LocalStorage from './LocalStorage';
@@ -93,6 +94,7 @@ export default class SettingsStore<T> {
       },
       value: data
     });
+    this.data = data;
     this.loaded = true;
   }
 
@@ -101,4 +103,17 @@ export default class SettingsStore<T> {
     this.data = undefined;
     this.loaded = true;
   }
+
+  get current(): T | undefined {
+    if (!this.loaded) {
+      logging.Error(
+        'system.kvs.SettingsStore.current',
+        'SettingsStore is not loaded yet, fallback to undefined or defaultValue',
+        {
+          key: this.storageKey
+        }
+      );
+    }
+    return this.data ?? this.options?.defaultValue;
+  }
 }