diff --git a/app/src/github/java/io/nekohasekai/sfa/vendor/ApkDownloader.kt b/app/src/github/java/io/nekohasekai/sfa/vendor/ApkDownloader.kt
index 98ce882..d90e2c7 100644
--- a/app/src/github/java/io/nekohasekai/sfa/vendor/ApkDownloader.kt
+++ b/app/src/github/java/io/nekohasekai/sfa/vendor/ApkDownloader.kt
@@ -1,5 +1,6 @@
 package io.nekohasekai.sfa.vendor
 
+import io.nekohasekai.libbox.HTTPResponseWriteToProgressHandler
 import io.nekohasekai.libbox.Libbox
 import io.nekohasekai.sfa.Application
 import io.nekohasekai.sfa.update.UpdateState
@@ -27,7 +28,15 @@ class ApkDownloader : Closeable {
         request.setURL(url)
 
         val response = request.execute()
-        response.writeTo(apkFile.absolutePath)
+        response.writeToWithProgress(
+            apkFile.absolutePath,
+            object : HTTPResponseWriteToProgressHandler {
+                override fun update(progress: Long, total: Long) {
+                    UpdateState.downloadProgress.value =
+                        if (total > 0) progress.toFloat() / total.toFloat() else null
+                }
+            },
+        )
 
         if (!apkFile.exists() || apkFile.length() == 0L) {
             throw Exception("Download failed: empty file")
diff --git a/app/src/main/java/io/nekohasekai/sfa/compose/MainActivity.kt b/app/src/main/java/io/nekohasekai/sfa/compose/MainActivity.kt
index 574422b..249d12c 100644
--- a/app/src/main/java/io/nekohasekai/sfa/compose/MainActivity.kt
+++ b/app/src/main/java/io/nekohasekai/sfa/compose/MainActivity.kt
@@ -42,6 +42,7 @@ import androidx.compose.material3.ExtendedFloatingActionButton
 import androidx.compose.material3.FloatingActionButton
 import androidx.compose.material3.Icon
 import androidx.compose.material3.IconButton
+import androidx.compose.material3.LinearProgressIndicator
 import androidx.compose.material3.MaterialTheme
 import androidx.compose.material3.ModalBottomSheet
 import androidx.compose.material3.NavigationBar
@@ -565,10 +566,22 @@ class MainActivity :
                                 color = MaterialTheme.colorScheme.error,
                             )
                         } else {
-                            Row(verticalAlignment = Alignment.CenterVertically) {
-                                CircularProgressIndicator(modifier = Modifier.size(24.dp))
-                                Spacer(modifier = Modifier.width(12.dp))
-                                Text(stringResource(R.string.downloading))
+                            val progress by UpdateState.downloadProgress
+                            Column {
+                                if (progress != null) {
+                                    Text("${stringResource(R.string.downloading)} ${(progress!! * 100).toInt()}%")
+                                } else {
+                                    Text(stringResource(R.string.downloading))
+                                }
+                                Spacer(modifier = Modifier.height(8.dp))
+                                if (progress != null) {
+                                    LinearProgressIndicator(
+                                        progress = { progress!! },
+                                        modifier = Modifier.fillMaxWidth(),
+                                    )
+                                } else {
+                                    LinearProgressIndicator(modifier = Modifier.fillMaxWidth())
+                                }
                             }
                         }
                     }
@@ -580,6 +593,7 @@ class MainActivity :
                             downloadJob = null
                             showDownloadDialog = false
                             downloadError = null
+                            UpdateState.downloadProgress.value = null
                         },
                     ) {
                         Text(stringResource(if (downloadError != null) R.string.ok else android.R.string.cancel))
diff --git a/app/src/main/java/io/nekohasekai/sfa/compose/screen/settings/AppSettingsScreen.kt b/app/src/main/java/io/nekohasekai/sfa/compose/screen/settings/AppSettingsScreen.kt
index 99c82d2..3a71f46 100644
--- a/app/src/main/java/io/nekohasekai/sfa/compose/screen/settings/AppSettingsScreen.kt
+++ b/app/src/main/java/io/nekohasekai/sfa/compose/screen/settings/AppSettingsScreen.kt
@@ -47,6 +47,7 @@ import androidx.compose.material3.CircularProgressIndicator
 import androidx.compose.material3.ExperimentalMaterial3Api
 import androidx.compose.material3.Icon
 import androidx.compose.material3.IconButton
+import androidx.compose.material3.LinearProgressIndicator
 import androidx.compose.material3.ListItem
 import androidx.compose.material3.ListItemDefaults
 import androidx.compose.material3.MaterialTheme
@@ -261,10 +262,22 @@ fun AppSettingsScreen(navController: NavController) {
                             color = MaterialTheme.colorScheme.error,
                         )
                     } else {
-                        Row(verticalAlignment = Alignment.CenterVertically) {
-                            CircularProgressIndicator(modifier = Modifier.size(24.dp))
-                            Spacer(modifier = Modifier.width(12.dp))
-                            Text(stringResource(R.string.downloading))
+                        val progress by UpdateState.downloadProgress
+                        Column {
+                            if (progress != null) {
+                                Text("${stringResource(R.string.downloading)} ${(progress!! * 100).toInt()}%")
+                            } else {
+                                Text(stringResource(R.string.downloading))
+                            }
+                            Spacer(modifier = Modifier.height(8.dp))
+                            if (progress != null) {
+                                LinearProgressIndicator(
+                                    progress = { progress!! },
+                                    modifier = Modifier.fillMaxWidth(),
+                                )
+                            } else {
+                                LinearProgressIndicator(modifier = Modifier.fillMaxWidth())
+                            }
                         }
                     }
                 }
@@ -276,6 +289,7 @@ fun AppSettingsScreen(navController: NavController) {
                         downloadJob = null
                         showDownloadDialog = false
                         downloadError = null
+                        UpdateState.downloadProgress.value = null
                     },
                 ) {
                     Text(stringResource(if (downloadError != null) R.string.ok else android.R.string.cancel))
diff --git a/app/src/main/java/io/nekohasekai/sfa/update/UpdateState.kt b/app/src/main/java/io/nekohasekai/sfa/update/UpdateState.kt
index 17efa3d..19ba94e 100644
--- a/app/src/main/java/io/nekohasekai/sfa/update/UpdateState.kt
+++ b/app/src/main/java/io/nekohasekai/sfa/update/UpdateState.kt
@@ -11,6 +11,7 @@ object UpdateState {
     val isChecking = mutableStateOf(false)
 
     val isDownloading = mutableStateOf(false)
+    val downloadProgress = mutableStateOf<Float?>(null)
     val downloadError = mutableStateOf<String?>(null)
 
     val cachedApkFile = mutableStateOf<File?>(null)
@@ -38,6 +39,7 @@ object UpdateState {
         hasUpdate.value = false
         updateInfo.value = null
         isDownloading.value = false
+        downloadProgress.value = null
         downloadError.value = null
         installStatus.value = InstallStatus.Idle
         cachedApkFile.value = null
@@ -46,6 +48,7 @@ object UpdateState {
 
     fun resetDownload() {
         isDownloading.value = false
+        downloadProgress.value = null
         downloadError.value = null
     }