diff --git a/build-ios.sh b/build-ios.sh
index 9d25c0469..be61a5d85 100755
--- a/build-ios.sh
+++ b/build-ios.sh
@@ -39,96 +39,90 @@ echo "SHERPA_ONNXRUNTIME_INCLUDE_DIR $SHERPA_ONNXRUNTIME_INCLUDE_DIR"
 # The symbol _NSLog is not defined
 #
 
-if [[ ! -f ./build/simulator_x86_64/lib/libsherpa-onnx-c-api.a ]]; then
-  cmake \
-    -DBUILD_PIPER_PHONMIZE_EXE=OFF \
-    -DBUILD_PIPER_PHONMIZE_TESTS=OFF \
-    -DBUILD_ESPEAK_NG_EXE=OFF \
-    -DBUILD_ESPEAK_NG_TESTS=OFF \
-    -S .. \
-    -DCMAKE_TOOLCHAIN_FILE=./toolchains/ios.toolchain.cmake \
-    -DPLATFORM=SIMULATOR64 \
-    -DENABLE_BITCODE=0 \
-    -DENABLE_ARC=1 \
-    -DENABLE_VISIBILITY=0 \
-    -DCMAKE_BUILD_TYPE=Release \
-    -DBUILD_SHARED_LIBS=OFF \
-    -DSHERPA_ONNX_ENABLE_PYTHON=OFF \
-    -DSHERPA_ONNX_ENABLE_TESTS=OFF \
-    -DSHERPA_ONNX_ENABLE_CHECK=OFF \
-    -DSHERPA_ONNX_ENABLE_PORTAUDIO=OFF \
-    -DSHERPA_ONNX_ENABLE_JNI=OFF \
-    -DSHERPA_ONNX_ENABLE_C_API=ON \
-    -DSHERPA_ONNX_ENABLE_WEBSOCKET=OFF \
-    -DDEPLOYMENT_TARGET=13.0 \
-    -B build/simulator_x86_64
-
-  cmake --build build/simulator_x86_64 -j 4 --verbose
-fi
+cmake \
+  -DBUILD_PIPER_PHONMIZE_EXE=OFF \
+  -DBUILD_PIPER_PHONMIZE_TESTS=OFF \
+  -DBUILD_ESPEAK_NG_EXE=OFF \
+  -DBUILD_ESPEAK_NG_TESTS=OFF \
+  -S .. \
+  -DCMAKE_TOOLCHAIN_FILE=./toolchains/ios.toolchain.cmake \
+  -DPLATFORM=SIMULATOR64 \
+  -DENABLE_BITCODE=0 \
+  -DENABLE_ARC=1 \
+  -DENABLE_VISIBILITY=0 \
+  -DCMAKE_BUILD_TYPE=Release \
+  -DBUILD_SHARED_LIBS=OFF \
+  -DSHERPA_ONNX_ENABLE_PYTHON=OFF \
+  -DSHERPA_ONNX_ENABLE_TESTS=OFF \
+  -DSHERPA_ONNX_ENABLE_CHECK=OFF \
+  -DSHERPA_ONNX_ENABLE_PORTAUDIO=OFF \
+  -DSHERPA_ONNX_ENABLE_JNI=OFF \
+  -DSHERPA_ONNX_ENABLE_C_API=ON \
+  -DSHERPA_ONNX_ENABLE_WEBSOCKET=OFF \
+  -DDEPLOYMENT_TARGET=13.0 \
+  -B build/simulator_x86_64
+
+cmake --build build/simulator_x86_64 -j 4 --verbose
 
 echo "Building for simulator (arm64)"
 
-if [[ ! -f ./build/simulator_arm64/lib/libsherpa-onnx-c-api.a ]]; then
-  cmake \
-    -DBUILD_PIPER_PHONMIZE_EXE=OFF \
-    -DBUILD_PIPER_PHONMIZE_TESTS=OFF \
-    -DBUILD_ESPEAK_NG_EXE=OFF \
-    -DBUILD_ESPEAK_NG_TESTS=OFF \
-    -S .. \
-    -DCMAKE_TOOLCHAIN_FILE=./toolchains/ios.toolchain.cmake \
-    -DPLATFORM=SIMULATORARM64 \
-    -DENABLE_BITCODE=0 \
-    -DENABLE_ARC=1 \
-    -DENABLE_VISIBILITY=0 \
-    -DCMAKE_BUILD_TYPE=Release \
-    -DCMAKE_INSTALL_PREFIX=./install \
-    -DBUILD_SHARED_LIBS=OFF \
-    -DSHERPA_ONNX_ENABLE_PYTHON=OFF \
-    -DSHERPA_ONNX_ENABLE_TESTS=OFF \
-    -DSHERPA_ONNX_ENABLE_CHECK=OFF \
-    -DSHERPA_ONNX_ENABLE_PORTAUDIO=OFF \
-    -DSHERPA_ONNX_ENABLE_JNI=OFF \
-    -DSHERPA_ONNX_ENABLE_C_API=ON \
-    -DSHERPA_ONNX_ENABLE_WEBSOCKET=OFF \
-    -DDEPLOYMENT_TARGET=13.0 \
-    -B build/simulator_arm64
-
-  cmake --build build/simulator_arm64 -j 4 --verbose
-fi
+cmake \
+  -DBUILD_PIPER_PHONMIZE_EXE=OFF \
+  -DBUILD_PIPER_PHONMIZE_TESTS=OFF \
+  -DBUILD_ESPEAK_NG_EXE=OFF \
+  -DBUILD_ESPEAK_NG_TESTS=OFF \
+  -S .. \
+  -DCMAKE_TOOLCHAIN_FILE=./toolchains/ios.toolchain.cmake \
+  -DPLATFORM=SIMULATORARM64 \
+  -DENABLE_BITCODE=0 \
+  -DENABLE_ARC=1 \
+  -DENABLE_VISIBILITY=0 \
+  -DCMAKE_BUILD_TYPE=Release \
+  -DCMAKE_INSTALL_PREFIX=./install \
+  -DBUILD_SHARED_LIBS=OFF \
+  -DSHERPA_ONNX_ENABLE_PYTHON=OFF \
+  -DSHERPA_ONNX_ENABLE_TESTS=OFF \
+  -DSHERPA_ONNX_ENABLE_CHECK=OFF \
+  -DSHERPA_ONNX_ENABLE_PORTAUDIO=OFF \
+  -DSHERPA_ONNX_ENABLE_JNI=OFF \
+  -DSHERPA_ONNX_ENABLE_C_API=ON \
+  -DSHERPA_ONNX_ENABLE_WEBSOCKET=OFF \
+  -DDEPLOYMENT_TARGET=13.0 \
+  -B build/simulator_arm64
+
+cmake --build build/simulator_arm64 -j 4 --verbose
 
 echo "Building for arm64"
 
 export SHERPA_ONNXRUNTIME_LIB_DIR=$PWD/ios-onnxruntime/onnxruntime.xcframework/ios-arm64
 
-if [[ ! -f ./build/os64/lib/libsherpa-onnx-c-api.a ]]; then
-  cmake \
-    -DBUILD_PIPER_PHONMIZE_EXE=OFF \
-    -DBUILD_PIPER_PHONMIZE_TESTS=OFF \
-    -DBUILD_ESPEAK_NG_EXE=OFF \
-    -DBUILD_ESPEAK_NG_TESTS=OFF \
-    -S .. \
-    -DCMAKE_TOOLCHAIN_FILE=./toolchains/ios.toolchain.cmake \
-    -DPLATFORM=OS64 \
-    -DENABLE_BITCODE=0 \
-    -DENABLE_ARC=1 \
-    -DENABLE_VISIBILITY=0 \
-    -DCMAKE_INSTALL_PREFIX=./install \
-    -DCMAKE_BUILD_TYPE=Release \
-    -DBUILD_SHARED_LIBS=OFF \
-    -DSHERPA_ONNX_ENABLE_PYTHON=OFF \
-    -DSHERPA_ONNX_ENABLE_TESTS=OFF \
-    -DSHERPA_ONNX_ENABLE_CHECK=OFF \
-    -DSHERPA_ONNX_ENABLE_PORTAUDIO=OFF \
-    -DSHERPA_ONNX_ENABLE_JNI=OFF \
-    -DSHERPA_ONNX_ENABLE_C_API=ON \
-    -DSHERPA_ONNX_ENABLE_WEBSOCKET=OFF \
-    -DDEPLOYMENT_TARGET=13.0 \
-    -B build/os64
-
-  cmake --build build/os64 -j 4
-  # Generate headers for sherpa-onnx.xcframework
-  cmake --build build/os64 --target install
-fi
+cmake \
+  -DBUILD_PIPER_PHONMIZE_EXE=OFF \
+  -DBUILD_PIPER_PHONMIZE_TESTS=OFF \
+  -DBUILD_ESPEAK_NG_EXE=OFF \
+  -DBUILD_ESPEAK_NG_TESTS=OFF \
+  -S .. \
+  -DCMAKE_TOOLCHAIN_FILE=./toolchains/ios.toolchain.cmake \
+  -DPLATFORM=OS64 \
+  -DENABLE_BITCODE=0 \
+  -DENABLE_ARC=1 \
+  -DENABLE_VISIBILITY=0 \
+  -DCMAKE_INSTALL_PREFIX=./install \
+  -DCMAKE_BUILD_TYPE=Release \
+  -DBUILD_SHARED_LIBS=OFF \
+  -DSHERPA_ONNX_ENABLE_PYTHON=OFF \
+  -DSHERPA_ONNX_ENABLE_TESTS=OFF \
+  -DSHERPA_ONNX_ENABLE_CHECK=OFF \
+  -DSHERPA_ONNX_ENABLE_PORTAUDIO=OFF \
+  -DSHERPA_ONNX_ENABLE_JNI=OFF \
+  -DSHERPA_ONNX_ENABLE_C_API=ON \
+  -DSHERPA_ONNX_ENABLE_WEBSOCKET=OFF \
+  -DDEPLOYMENT_TARGET=13.0 \
+  -B build/os64
+
+cmake --build build/os64 -j 4
+# Generate headers for sherpa-onnx.xcframework
+cmake --build build/os64 --target install
 
 echo "Generate xcframework"
 
diff --git a/ios-swiftui/SherpaOnnxTts/SherpaOnnxTts/ViewModel.swift b/ios-swiftui/SherpaOnnxTts/SherpaOnnxTts/ViewModel.swift
index 3e5c381c5..45db6ec17 100644
--- a/ios-swiftui/SherpaOnnxTts/SherpaOnnxTts/ViewModel.swift
+++ b/ios-swiftui/SherpaOnnxTts/SherpaOnnxTts/ViewModel.swift
@@ -93,12 +93,50 @@ func getTtsFor_en_US_amy_low() -> SherpaOnnxOfflineTtsWrapper {
   return SherpaOnnxOfflineTtsWrapper(config: &config)
 }
 
+// https://k2-fsa.github.io/sherpa/onnx/tts/pretrained_models/vits.html#vits-melo-tts-zh-en-chinese-english-1-speaker
+func getTtsFor_zh_en_melo_tts() -> SherpaOnnxOfflineTtsWrapper {
+  // please see https://github.com/k2-fsa/sherpa-onnx/releases/download/tts-models/vits-melo-tts-zh_en.tar.bz2
+
+  let model = getResource("model", "onnx")
+
+  let tokens = getResource("tokens", "txt")
+  let lexicon = getResource("lexicon", "txt")
+
+  let dictDir = resourceURL(to: "dict")
+
+  let numFst = getResource("number", "fst")
+  let dateFst = getResource("date", "fst")
+  let phoneFst = getResource("phone", "fst")
+  let ruleFsts = "\(dateFst),\(phoneFst),\(numFst)"
+
+  let vits = sherpaOnnxOfflineTtsVitsModelConfig(
+    model: model, lexicon: lexicon, tokens: tokens,
+    dataDir: "",
+    noiseScale: 0.667,
+    noiseScaleW: 0.8,
+    lengthScale: 1.0,
+    dictDir: dictDir
+  )
+
+  let modelConfig = sherpaOnnxOfflineTtsModelConfig(vits: vits)
+  var config = sherpaOnnxOfflineTtsConfig(
+    model: modelConfig,
+    ruleFsts: ruleFsts
+  )
+
+  return SherpaOnnxOfflineTtsWrapper(config: &config)
+}
+
 func createOfflineTts() -> SherpaOnnxOfflineTtsWrapper {
+  // Please enable only one of them
+
   return getTtsFor_en_US_amy_low()
 
   // return getTtsForVCTK()
 
   // return getTtsForAishell3()
 
+  // return getTtsFor_zh_en_melo_tts()
+
   // please add more models on need by following the above two examples
 }