diff --git a/src/components/__tests__/OnboardingModal.test.tsx b/src/components/__tests__/OnboardingModal.test.tsx
new file mode 100644
index 0000000..58de47d
--- /dev/null
+++ b/src/components/__tests__/OnboardingModal.test.tsx
@@ -0,0 +1,352 @@
+import React from 'react';
+import { Image } from 'react-native';
+import { render, fireEvent, act } from '@testing-library/react-native';
+import OnboardingModal from '../OnboardingModal';
+import { useThemeColors } from '../../utils/useThemeColors';
+import { Colors } from '../../utils/theme';
+import { t } from '../../utils/i18n';
+
+jest.mock('../../utils/useThemeColors', () => ({
+  useThemeColors: jest.fn(),
+}));
+
+const mockUseThemeColors = useThemeColors as jest.Mock;
+
+describe('OnboardingModal', () => {
+  const mockOnDismiss = jest.fn();
+
+  beforeEach(() => {
+    jest.clearAllMocks();
+    mockUseThemeColors.mockReturnValue({ colors: Colors.light, isDark: false });
+  });
+
+  const getListNode = (root: any) =>
+    root.queryAll((node: any) => Array.isArray(node.props?.data))[0];
+
+  const getDots = (root: any) =>
+    root.queryAll(
+      (node: any) =>
+        Array.isArray(node.props?.style) &&
+        node.props.style.some((s: any) => s?.borderRadius === 4 && s?.height === 8)
+    );
+
+  describe('rendering and visibility', () => {
+    it('renders modal with visible=true and slide animation', async () => {
+      const { root } = await render(<OnboardingModal visible={true} onDismiss={mockOnDismiss} />);
+
+      expect(root?.props.visible).toBe(true);
+      expect(root?.props.animationType).toBe('slide');
+      expect(root?.props.transparent).toBe(false);
+    });
+
+    it('renders null when visible prop is false', async () => {
+      const { toJSON } = await render(
+        <OnboardingModal visible={false} onDismiss={mockOnDismiss} />
+      );
+
+      expect(toJSON()).toBeNull();
+    });
+
+    it('renders SafeAreaView with light background color', async () => {
+      const { root } = await render(<OnboardingModal visible={true} onDismiss={mockOnDismiss} />);
+
+      const safeArea = (root as any).children[0];
+      expect(safeArea.props.style).toEqual(
+        expect.arrayContaining([
+          expect.objectContaining({ backgroundColor: Colors.light.background }),
+        ])
+      );
+    });
+
+    it('renders all slide titles and descriptions', async () => {
+      const { getByText } = await render(
+        <OnboardingModal visible={true} onDismiss={mockOnDismiss} />
+      );
+
+      expect(getByText(t('onboarding.slide1Title'))).toBeTruthy();
+      expect(getByText(t('onboarding.slide1Desc'))).toBeTruthy();
+      expect(getByText(t('onboarding.slide2Title'))).toBeTruthy();
+      expect(getByText(t('onboarding.slide2Desc'))).toBeTruthy();
+      expect(getByText(t('onboarding.slide3Title'))).toBeTruthy();
+      expect(getByText(t('onboarding.slide3Desc'))).toBeTruthy();
+      expect(getByText(t('onboarding.slide4Title'))).toBeTruthy();
+      expect(getByText(t('onboarding.slide4Desc'))).toBeTruthy();
+      expect(getByText(t('onboarding.slide5Title'))).toBeTruthy();
+      expect(getByText(t('onboarding.slide5Desc'))).toBeTruthy();
+    });
+
+    it('renders all 5 slide images with contain resizeMode and defined source', async () => {
+      const { root } = await render(<OnboardingModal visible={true} onDismiss={mockOnDismiss} />);
+
+      const images = (root as any).queryAll(
+        (node: any) => node.type === Image || node.type === 'Image'
+      );
+      expect(images.length).toBe(5);
+      images.forEach((img: any) => {
+        expect(img.props.resizeMode).toBe('contain');
+        expect(img.props.source).toBeDefined();
+      });
+    });
+
+    it('configures FlatList with paging and keyExtractor', async () => {
+      const { root } = await render(<OnboardingModal visible={true} onDismiss={mockOnDismiss} />);
+
+      const listNode = getListNode(root);
+      expect(listNode.props.horizontal).toBe(true);
+      expect(listNode.props.pagingEnabled).toBe(true);
+      expect(listNode.props.showsHorizontalScrollIndicator).toBe(false);
+      expect(listNode.props.bounces).toBe(false);
+      expect(listNode.props.data.length).toBe(5);
+      expect(listNode.props.keyExtractor({ id: 'custom-id' })).toBe('custom-id');
+    });
+
+    it('provides expected viewability configuration threshold', async () => {
+      const { root } = await render(<OnboardingModal visible={true} onDismiss={mockOnDismiss} />);
+
+      const listNode = getListNode(root);
+      expect(listNode.props.viewabilityConfigCallbackPairs[0].viewabilityConfig).toEqual({
+        viewAreaCoveragePercentThreshold: 50,
+      });
+    });
+  });
+
+  describe('theming', () => {
+    it('applies light theme colors to texts, buttons, and dots', async () => {
+      mockUseThemeColors.mockReturnValue({ colors: Colors.light, isDark: false });
+
+      const { root, getByText } = await render(
+        <OnboardingModal visible={true} onDismiss={mockOnDismiss} />
+      );
+
+      const skipText = getByText(t('onboarding.skip'));
+      expect(skipText.props.style).toEqual(
+        expect.arrayContaining([expect.objectContaining({ color: Colors.light.textSecondary })])
+      );
+
+      const titleText = getByText(t('onboarding.slide1Title'));
+      expect(titleText.props.style).toEqual(
+        expect.arrayContaining([expect.objectContaining({ color: Colors.light.text })])
+      );
+
+      const descText = getByText(t('onboarding.slide1Desc'));
+      expect(descText.props.style).toEqual(
+        expect.arrayContaining([expect.objectContaining({ color: Colors.light.textSecondary })])
+      );
+
+      const dismissBtn = getByText(t('onboarding.dismissBtn')).parent as any;
+      expect(dismissBtn?.props.style).toEqual(
+        expect.arrayContaining([expect.objectContaining({ backgroundColor: Colors.light.primary })])
+      );
+
+      const dots = getDots(root);
+      expect(dots[0].props.style).toEqual(
+        expect.arrayContaining([expect.objectContaining({ backgroundColor: Colors.light.primary })])
+      );
+      expect(dots[1].props.style).toEqual(
+        expect.arrayContaining([expect.objectContaining({ backgroundColor: Colors.light.border })])
+      );
+    });
+
+    it('applies dark theme colors to texts, buttons, background, and dots', async () => {
+      mockUseThemeColors.mockReturnValue({ colors: Colors.dark, isDark: true });
+
+      const { root, getByText } = await render(
+        <OnboardingModal visible={true} onDismiss={mockOnDismiss} />
+      );
+
+      const safeArea = (root as any).children[0];
+      expect(safeArea.props.style).toEqual(
+        expect.arrayContaining([
+          expect.objectContaining({ backgroundColor: Colors.dark.background }),
+        ])
+      );
+
+      const skipText = getByText(t('onboarding.skip'));
+      expect(skipText.props.style).toEqual(
+        expect.arrayContaining([expect.objectContaining({ color: Colors.dark.textSecondary })])
+      );
+
+      const titleText = getByText(t('onboarding.slide1Title'));
+      expect(titleText.props.style).toEqual(
+        expect.arrayContaining([expect.objectContaining({ color: Colors.dark.text })])
+      );
+
+      const descText = getByText(t('onboarding.slide1Desc'));
+      expect(descText.props.style).toEqual(
+        expect.arrayContaining([expect.objectContaining({ color: Colors.dark.textSecondary })])
+      );
+
+      const dismissBtn = getByText(t('onboarding.dismissBtn')).parent as any;
+      expect(dismissBtn?.props.style).toEqual(
+        expect.arrayContaining([expect.objectContaining({ backgroundColor: Colors.dark.primary })])
+      );
+
+      const dots = getDots(root);
+      expect(dots[0].props.style).toEqual(
+        expect.arrayContaining([expect.objectContaining({ backgroundColor: Colors.dark.primary })])
+      );
+      expect(dots[1].props.style).toEqual(
+        expect.arrayContaining([expect.objectContaining({ backgroundColor: Colors.dark.border })])
+      );
+    });
+  });
+
+  describe('user interactions and dismissal', () => {
+    it('calls onDismiss when pressing the Skip button', async () => {
+      const { getByText } = await render(
+        <OnboardingModal visible={true} onDismiss={mockOnDismiss} />
+      );
+
+      const skipButton = getByText(t('onboarding.skip'));
+      fireEvent.press(skipButton);
+
+      expect(mockOnDismiss).toHaveBeenCalledTimes(1);
+    });
+
+    it('calls onDismiss when pressing the final Start Climbing button', async () => {
+      const { getByText } = await render(
+        <OnboardingModal visible={true} onDismiss={mockOnDismiss} />
+      );
+
+      const dismissButton = getByText(t('onboarding.dismissBtn'));
+      fireEvent.press(dismissButton);
+
+      expect(mockOnDismiss).toHaveBeenCalledTimes(1);
+    });
+  });
+
+  describe('pagination and slide changes', () => {
+    it('renders initial state with active first dot and visible skip button', async () => {
+      const { root, getByText } = await render(
+        <OnboardingModal visible={true} onDismiss={mockOnDismiss} />
+      );
+
+      expect(getByText(t('onboarding.skip'))).toBeTruthy();
+
+      const dots = getDots(root);
+      expect(dots.length).toBe(5);
+      expect(dots[0].props.style).toEqual(
+        expect.arrayContaining([expect.objectContaining({ width: 20 })])
+      );
+      expect(dots[1].props.style).not.toEqual(
+        expect.arrayContaining([expect.objectContaining({ width: 20 })])
+      );
+    });
+
+    it('updates active dot when changing to slide 2', async () => {
+      const { root } = await render(<OnboardingModal visible={true} onDismiss={mockOnDismiss} />);
+
+      const listNode = getListNode(root);
+      const onViewableItemsChanged =
+        listNode.props.viewabilityConfigCallbackPairs[0].onViewableItemsChanged;
+
+      await act(async () => {
+        onViewableItemsChanged({
+          viewableItems: [{ index: 2 }],
+        });
+      });
+
+      const dots = getDots(root);
+      expect(dots[2].props.style).toEqual(
+        expect.arrayContaining([expect.objectContaining({ width: 20 })])
+      );
+      expect(dots[0].props.style).not.toEqual(
+        expect.arrayContaining([expect.objectContaining({ width: 20 })])
+      );
+    });
+
+    it('hides the Skip button on the last slide (index 4)', async () => {
+      const { root, queryByText } = await render(
+        <OnboardingModal visible={true} onDismiss={mockOnDismiss} />
+      );
+
+      const listNode = getListNode(root);
+      const onViewableItemsChanged =
+        listNode.props.viewabilityConfigCallbackPairs[0].onViewableItemsChanged;
+
+      await act(async () => {
+        onViewableItemsChanged({
+          viewableItems: [{ index: 4 }],
+        });
+      });
+
+      expect(queryByText(t('onboarding.skip'))).toBeNull();
+
+      const dots = getDots(root);
+      expect(dots[4].props.style).toEqual(
+        expect.arrayContaining([expect.objectContaining({ width: 20 })])
+      );
+    });
+
+    it('restores the Skip button when navigating back from the last slide', async () => {
+      const { root, queryByText, getByText } = await render(
+        <OnboardingModal visible={true} onDismiss={mockOnDismiss} />
+      );
+
+      const listNode = getListNode(root);
+      const onViewableItemsChanged =
+        listNode.props.viewabilityConfigCallbackPairs[0].onViewableItemsChanged;
+
+      await act(async () => {
+        onViewableItemsChanged({
+          viewableItems: [{ index: 4 }],
+        });
+      });
+      expect(queryByText(t('onboarding.skip'))).toBeNull();
+
+      await act(async () => {
+        onViewableItemsChanged({
+          viewableItems: [{ index: 1 }],
+        });
+      });
+      expect(getByText(t('onboarding.skip'))).toBeTruthy();
+    });
+
+    it('falls back to index 0 when viewableItem index is undefined', async () => {
+      const { root, getByText } = await render(
+        <OnboardingModal visible={true} onDismiss={mockOnDismiss} />
+      );
+
+      const listNode = getListNode(root);
+      const onViewableItemsChanged =
+        listNode.props.viewabilityConfigCallbackPairs[0].onViewableItemsChanged;
+
+      await act(async () => {
+        onViewableItemsChanged({
+          viewableItems: [{ index: undefined }],
+        });
+      });
+
+      expect(getByText(t('onboarding.skip'))).toBeTruthy();
+      const dots = getDots(root);
+      expect(dots[0].props.style).toEqual(
+        expect.arrayContaining([expect.objectContaining({ width: 20 })])
+      );
+    });
+
+    it('does not modify index when viewableItems array is empty', async () => {
+      const { root, queryByText } = await render(
+        <OnboardingModal visible={true} onDismiss={mockOnDismiss} />
+      );
+
+      const listNode = getListNode(root);
+      const onViewableItemsChanged =
+        listNode.props.viewabilityConfigCallbackPairs[0].onViewableItemsChanged;
+
+      await act(async () => {
+        onViewableItemsChanged({
+          viewableItems: [{ index: 4 }],
+        });
+      });
+      expect(queryByText(t('onboarding.skip'))).toBeNull();
+
+      await act(async () => {
+        onViewableItemsChanged({
+          viewableItems: [],
+        });
+      });
+
+      expect(queryByText(t('onboarding.skip'))).toBeNull();
+    });
+  });
+});