diff --git a/runtime/android/README.md b/runtime/android/README.md
new file mode 100644
index 0000000..3a4a191
--- /dev/null
+++ b/runtime/android/README.md
@@ -0,0 +1,27 @@
+# Usage
+
+Most of AI engineers are not familiar with Android development, this is a simple ‘how to’.
+
+1. Train your model with your data
+
+2. Export pytorch model to onnx model
+
+3. Convert onnx model for mobile deployment
+
+```bash
+python -m onnxruntime.tools.convert_onnx_models_to_ort your-model.onnx
+```
+you will get `your-model.ort` and `your-model.with_runtime_opt.ort`
+
+
+4. Install Android Studio and open path of wekws/runtime/android and build
+
+*NOTE:* The default feature_dim in code is 40, if your model’s is 80, change it here `./app/src/main/cpp/wekws.cc`
+
+```C++
+  feature_config = std::make_shared<wenet::FeaturePipelineConfig>(40, 16000);  // 40 -> 80
+```
+
+It’s also can be built on Linux by runing `bash ./gradlew build`
+
+5. Install `app/build/outputs/apk/debug/app-debug.apk` to your phone and try it.
diff --git a/runtime/android/app/build.gradle b/runtime/android/app/build.gradle
index 5984fbb..2aa287b 100644
--- a/runtime/android/app/build.gradle
+++ b/runtime/android/app/build.gradle
@@ -45,8 +45,8 @@ dependencies {
     implementation 'androidx.appcompat:appcompat:1.3.0'
     implementation 'com.google.android.material:material:1.4.0'
     implementation 'androidx.constraintlayout:constraintlayout:2.0.4'
-    implementation 'com.microsoft.onnxruntime:onnxruntime-mobile:latest.release'
-    extractForNativeBuild 'com.microsoft.onnxruntime:onnxruntime-mobile:latest.release'
+    implementation 'com.microsoft.onnxruntime:onnxruntime-mobile:1.12.1'
+    extractForNativeBuild 'com.microsoft.onnxruntime:onnxruntime-mobile:1.12.1'
     testImplementation 'junit:junit:4.13.2'
     androidTestImplementation 'androidx.test.ext:junit:1.1.3'
     androidTestImplementation 'androidx.test.espresso:espresso-core:3.4.0'
@@ -70,4 +70,4 @@ tasks.whenTaskAdded { task ->
     if (task.name.contains('externalNativeBuild')) {
         task.dependsOn(extractAARForNativeBuild)
     }
-}
\ No newline at end of file
+}