diff --git a/web/src/env.d.ts b/web/src/env.d.ts
new file mode 100644
index 0000000..060dba8
--- /dev/null
+++ b/web/src/env.d.ts
@@ -0,0 +1,2 @@
+declare const __COMMIT_HASH__: string;
+declare const __BUILD_TIME__: string;
diff --git a/web/src/pages/SettingsPage.tsx b/web/src/pages/SettingsPage.tsx
index a2ea995..e22f894 100644
--- a/web/src/pages/SettingsPage.tsx
+++ b/web/src/pages/SettingsPage.tsx
@@ -6,6 +6,7 @@ import TextField from '@mui/material/TextField';
 import CircularProgress from '@mui/material/CircularProgress';
 import Alert from '@mui/material/Alert';
 import NotificationsActiveIcon from '@mui/icons-material/NotificationsActive';
+import InfoOutlinedIcon from '@mui/icons-material/InfoOutlined';
 import {
   usePushNotifications,
   localTimeToUtc,
@@ -142,6 +143,28 @@ export function SettingsPage() {
           </Box>
         )}
       </Box>
+
+      <Box
+        sx={{
+          bgcolor: 'background.paper',
+          borderRadius: 2,
+          p: 2.5,
+          mt: 3,
+        }}
+      >
+        <Box sx={{ display: 'flex', alignItems: 'center', gap: 1.5, mb: 2 }}>
+          <InfoOutlinedIcon sx={{ color: 'primary.main' }} />
+          <Typography variant="h6" sx={{ fontSize: '1.1rem' }}>
+            About
+          </Typography>
+        </Box>
+        <Typography variant="body2" color="text.secondary">
+          Commit: {__COMMIT_HASH__}
+        </Typography>
+        <Typography variant="body2" color="text.secondary">
+          Built: {new Date(__BUILD_TIME__).toLocaleString()}
+        </Typography>
+      </Box>
     </Box>
   );
 }
diff --git a/web/vite.config.ts b/web/vite.config.ts
index 956edea..6007ff7 100644
--- a/web/vite.config.ts
+++ b/web/vite.config.ts
@@ -2,9 +2,17 @@ import { defineConfig } from 'vite'
 import react from '@vitejs/plugin-react'
 import { VitePWA } from 'vite-plugin-pwa'
 import path from 'path'
+import { execSync } from 'child_process'
+
+const commitHash = execSync('git rev-parse --short HEAD').toString().trim()
+const buildTime = new Date().toISOString()
 
 // https://vite.dev/config/
 export default defineConfig({
+  define: {
+    __COMMIT_HASH__: JSON.stringify(commitHash),
+    __BUILD_TIME__: JSON.stringify(buildTime),
+  },
   plugins: [
     react(),
     VitePWA({