diff --git a/apps/mobile/src/contexts/FitnessGoalsContext.tsx b/apps/mobile/src/contexts/FitnessGoalsContext.tsx
index d4150c1..cf861a9 100644
--- a/apps/mobile/src/contexts/FitnessGoalsContext.tsx
+++ b/apps/mobile/src/contexts/FitnessGoalsContext.tsx
@@ -3,6 +3,7 @@ import React, {
   useContext,
   useState,
   useCallback,
+  useEffect,
   useRef,
 } from "react";
 import { useUser, useAuth } from "@clerk/clerk-expo";
@@ -168,12 +169,22 @@ export function FitnessGoalsProvider({
 
   const clearCache = useCallback(() => {
     setGoals([]);
+    setLoading(false);
     setLastFetchTime(0);
     setError(null);
     fetchInProgress.current = false;
     log.debug("Fitness goals cache cleared");
   }, []);
 
+  useEffect(() => {
+    clearCache();
+    if (user?.id) {
+      log.debug("Fitness goals cache reset for user", { userId: user.id });
+    } else {
+      log.debug("Fitness goals cache reset on sign-out");
+    }
+  }, [user?.id, clearCache]);
+
   return (
     <FitnessGoalsContext.Provider
       value={{
diff --git a/apps/mobile/src/contexts/HydrationContext.tsx b/apps/mobile/src/contexts/HydrationContext.tsx
index bfc829d..ba186c1 100644
--- a/apps/mobile/src/contexts/HydrationContext.tsx
+++ b/apps/mobile/src/contexts/HydrationContext.tsx
@@ -74,6 +74,18 @@ export function HydrationProvider({ children }: { children: React.ReactNode }) {
     fetchTodayHydration();
   }, [fetchTodayHydration]);
 
+  useEffect(() => {
+    setHydration(null);
+    setError(null);
+    setLoading(false);
+    setWaterGoal(2000);
+    if (user?.id) {
+      log.debug("Hydration state reset for user", { userId: user.id });
+    } else {
+      log.debug("Hydration state reset on sign-out");
+    }
+  }, [user?.id]);
+
   const addWater = useCallback(
     async (amount: number) => {
       if (!user?.id) return;
diff --git a/apps/mobile/src/contexts/NotificationsContext.tsx b/apps/mobile/src/contexts/NotificationsContext.tsx
index f2159e2..9e227ba 100644
--- a/apps/mobile/src/contexts/NotificationsContext.tsx
+++ b/apps/mobile/src/contexts/NotificationsContext.tsx
@@ -6,7 +6,7 @@ import React, {
   useCallback,
   useRef,
 } from "react";
-import { useAuth } from "@clerk/clerk-expo";
+import { useAuth, useUser } from "@clerk/clerk-expo";
 import {
   fetchNotifications,
   fetchUnreadCount,
@@ -37,6 +37,7 @@ export function NotificationsProvider({
   children: React.ReactNode;
 }) {
   const { getToken, isSignedIn } = useAuth();
+  const { user } = useUser();
   const [notifications, setNotifications] = useState<Notification[]>([]);
   const [unreadCount, setUnreadCount] = useState(0);
   const [loading, setLoading] = useState(false);
@@ -160,6 +161,19 @@ export function NotificationsProvider({
     // eslint-disable-next-line react-hooks/exhaustive-deps
   }, [isSignedIn]); // Only run when sign-in state changes
 
+  useEffect(() => {
+    setNotifications([]);
+    setUnreadCount(0);
+    setLoading(false);
+    fetchInProgressRef.current = false;
+    lastFetchTimeRef.current = 0;
+    if (user?.id) {
+      log.debug("Notifications state reset for user", { userId: user.id });
+    } else {
+      log.debug("Notifications state reset on sign-out");
+    }
+  }, [user?.id]);
+
   // Periodic refresh every 30 seconds
   useEffect(() => {
     if (!isSignedIn) return;
diff --git a/apps/mobile/src/contexts/NutritionContext.tsx b/apps/mobile/src/contexts/NutritionContext.tsx
index d97b82c..f2bb6fe 100644
--- a/apps/mobile/src/contexts/NutritionContext.tsx
+++ b/apps/mobile/src/contexts/NutritionContext.tsx
@@ -88,6 +88,19 @@ export function NutritionProvider({ children }: { children: React.ReactNode }) {
     fetchTodayNutrition();
   }, [fetchTodayNutrition]);
 
+  useEffect(() => {
+    setNutrition(null);
+    setMeals([]);
+    setError(null);
+    setLoading(false);
+    setCalorieGoal(2000);
+    if (user?.id) {
+      log.debug("Nutrition state reset for user", { userId: user.id });
+    } else {
+      log.debug("Nutrition state reset on sign-out");
+    }
+  }, [user?.id]);
+
   const addMeal = useCallback(
     async (data: Omit<MealEntry, "id" | "createdAt" | "dailyNutritionId">) => {
       if (!user?.id) return;
diff --git a/apps/mobile/src/contexts/RecommendationsContext.tsx b/apps/mobile/src/contexts/RecommendationsContext.tsx
index a2c81d5..211afde 100644
--- a/apps/mobile/src/contexts/RecommendationsContext.tsx
+++ b/apps/mobile/src/contexts/RecommendationsContext.tsx
@@ -3,6 +3,7 @@ import React, {
   useContext,
   useState,
   useCallback,
+  useEffect,
   useRef,
 } from "react";
 import { useUser, useAuth } from "@clerk/clerk-expo";
@@ -108,12 +109,22 @@ export function RecommendationsProvider({
 
   const clearCache = useCallback(() => {
     setRecommendations([]);
+    setLoading(false);
     setLastFetchTime(0);
     setError(null);
     fetchInProgress.current = false;
     log.debug("Recommendations cache cleared");
   }, []);
 
+  useEffect(() => {
+    clearCache();
+    if (user?.id) {
+      log.debug("Recommendations cache reset for user", { userId: user.id });
+    } else {
+      log.debug("Recommendations cache reset on sign-out");
+    }
+  }, [user?.id, clearCache]);
+
   return (
     <RecommendationsContext.Provider
       value={{
diff --git a/apps/mobile/src/contexts/StatisticsContext.tsx b/apps/mobile/src/contexts/StatisticsContext.tsx
index d5f60ba..f2502a2 100644
--- a/apps/mobile/src/contexts/StatisticsContext.tsx
+++ b/apps/mobile/src/contexts/StatisticsContext.tsx
@@ -1,4 +1,10 @@
-import React, { createContext, useContext, useState, useCallback } from "react";
+import React, {
+  createContext,
+  useContext,
+  useState,
+  useCallback,
+  useEffect,
+} from "react";
 import { useUser, useAuth } from "@clerk/clerk-expo";
 import { getUserStatistics } from "../api/statistics";
 import type { UserStatisticsResponse } from "../api/types";
@@ -75,11 +81,21 @@ export function StatisticsProvider({
 
   const clearCache = useCallback(() => {
     setStatistics(null);
+    setLoading(false);
     setLastFetchTime(0);
     setError(null);
     log.debug("Statistics cache cleared");
   }, []);
 
+  useEffect(() => {
+    clearCache();
+    if (user?.id) {
+      log.debug("Statistics cache reset for user", { userId: user.id });
+    } else {
+      log.debug("Statistics cache reset on sign-out");
+    }
+  }, [user?.id, clearCache]);
+
   const forceRefresh = useCallback(async () => {
     if (!user?.id) return;