diff --git a/.changes/kill-dev-process-on-err.md b/.changes/kill-dev-process-on-err.md
new file mode 100644
index 00000000000..eadd5fc8c4e
--- /dev/null
+++ b/.changes/kill-dev-process-on-err.md
@@ -0,0 +1,6 @@
+---
+"tauri-cli": patch/bug
+"@tauri-apps/cli": patch/bug
+---
+
+Exit `beforeDevCommand` process if the android or iOS `dev` command fails.
diff --git a/tooling/cli/src/dev.rs b/tooling/cli/src/dev.rs
index ef51fdd52f3..cf0975f8711 100644
--- a/tooling/cli/src/dev.rs
+++ b/tooling/cli/src/dev.rs
@@ -444,10 +444,11 @@ fn check_for_updates() -> Result<()> {
 pub fn kill_before_dev_process() {
   if let Some(child) = BEFORE_DEV.get() {
     let child = child.lock().unwrap();
-    KILL_BEFORE_DEV_FLAG
-      .get()
-      .unwrap()
-      .store(true, Ordering::Relaxed);
+    let kill_before_dev_flag = KILL_BEFORE_DEV_FLAG.get().unwrap();
+    if kill_before_dev_flag.load(Ordering::Relaxed) {
+      return;
+    }
+    kill_before_dev_flag.store(true, Ordering::Relaxed);
     #[cfg(windows)]
     {
       let powershell_path = std::env::var("SYSTEMROOT").map_or_else(
diff --git a/tooling/cli/src/mobile/android/dev.rs b/tooling/cli/src/mobile/android/dev.rs
index ba2e56c5078..058d8da7e80 100644
--- a/tooling/cli/src/mobile/android/dev.rs
+++ b/tooling/cli/src/mobile/android/dev.rs
@@ -96,7 +96,15 @@ impl From<Options> for DevOptions {
   }
 }
 
-pub fn command(mut options: Options, noise_level: NoiseLevel) -> Result<()> {
+pub fn command(options: Options, noise_level: NoiseLevel) -> Result<()> {
+  let result = run_command(options, noise_level);
+  if result.is_err() {
+    crate::dev::kill_before_dev_process();
+  }
+  result
+}
+
+fn run_command(mut options: Options, noise_level: NoiseLevel) -> Result<()> {
   delete_codegen_vars();
 
   let (merge_config, _merge_config_path) = resolve_merge_config(&options.config)?;
diff --git a/tooling/cli/src/mobile/ios/dev.rs b/tooling/cli/src/mobile/ios/dev.rs
index 0bce1a32e0e..ec866cdc5d0 100644
--- a/tooling/cli/src/mobile/ios/dev.rs
+++ b/tooling/cli/src/mobile/ios/dev.rs
@@ -83,7 +83,15 @@ impl From<Options> for DevOptions {
   }
 }
 
-pub fn command(mut options: Options, noise_level: NoiseLevel) -> Result<()> {
+pub fn command(options: Options, noise_level: NoiseLevel) -> Result<()> {
+  let result = run_command(options, noise_level);
+  if result.is_err() {
+    crate::dev::kill_before_dev_process();
+  }
+  result
+}
+
+fn run_command(mut options: Options, noise_level: NoiseLevel) -> Result<()> {
   if var_os(APPLE_DEVELOPMENT_TEAM_ENV_VAR_NAME).is_none() {
     if let Ok(teams) = find_development_teams() {
       let index = match teams.len() {