diff --git a/.github/workflows/eas-build-android.yml b/.github/workflows/eas-build-android.yml
index b44a89c..3231436 100644
--- a/.github/workflows/eas-build-android.yml
+++ b/.github/workflows/eas-build-android.yml
@@ -64,30 +64,71 @@ jobs:
           distribution: "temurin"
       - uses: android-actions/setup-android@v3
       - run: cd expo && rm ./config/${{ matrix.target }}/.gitignore
+      - run: cd expo && rm ./.gitignore
       - run: cd expo && yarn install
       - run: cd expo && envsubst < ./.env > ./.env.local
         env:
           APP_CHECK_DEBUG_TOKEN: ${{ secrets.APP_CHECK_DEBUG_TOKEN }}
           GRAPHQL_ENDPOINT: ${{ secrets.GRAPHQL_ENDPOINT }}
-      - run: cd expo && ./scripts/eas.sh build --profile ${{ matrix.target }} --platform android --local --output ./build/hpapp-${{ matrix.target }}.apk
+      - run: cd expo && ./scripts/eas.sh build --profile ${{ matrix.target }} --platform android --local --output ${{ github.workspace }}/expo/build/hpapp-${{ matrix.target }}.apk
         if: ${{ matrix.target == 'dev' }}
         env:
           HPAPP_CONFIG_NAME: ${{ matrix.target }}
-          SECRETS_JSON: ${{ secrets.SECRETS_JSON }}
+          GOOGLE_SERVICES_INFO_PLIST: ${{ secrets.GOOGLE_SERVICES_INFO_PLIST }}
           GOOGLE_SERVICES_JSON: ${{ secrets.GOOGLE_SERVICES_JSON }}
-      - run: cd expo && ./scripts/eas.sh build --profile ${{ matrix.target }} --platform android --local --output ./build/hpapp-${{ matrix.target }}.aab
+      - run: cd expo && ./scripts/eas.sh build --profile ${{ matrix.target }} --platform android --local --output ${{ github.workspace }}/expo/build/hpapp-${{ matrix.target }}.aab
         if: ${{ matrix.target != 'dev' }}
         env:
           HPAPP_CONFIG_NAME: ${{ matrix.target }}
           GOOGLE_SERVICES_INFO_PLIST: ${{ secrets.GOOGLE_SERVICES_INFO_PLIST }}
           GOOGLE_SERVICES_JSON: ${{ secrets.GOOGLE_SERVICES_JSON }}
-      # [dev] upload artifacts
       - uses: actions/upload-artifact@v4
+        if: ${{ matrix.target == 'dev' }}
         with:
           name: hpapp-${{ matrix.target }}.apk
           path: ${{ github.workspace }}/expo/build/hpapp-${{ matrix.target }}.apk
-      # [beta/prod] submit
-      - run: cd expo && envsubst < ./config/eas.json.env > ./config/eas.json
+      - uses: actions/upload-artifact@v4
         if: ${{ matrix.target != 'dev' }}
+        with:
+          name: hpapp-${{ matrix.target }}.aab
+          path: ${{ github.workspace }}/expo/build/hpapp-${{ matrix.target }}.aab
+  submit:
+    needs: [generate-matrix, build]
+    strategy:
+      matrix:
+        target: ${{ fromJson(needs.generate-matrix.outputs.target) }}
+        exclude:
+          - target: dev
+    runs-on: ubuntu-latest
+    environment:
+      name: eas-${{ matrix.target }}
+    steps:
+      - uses: actions/checkout@v3
+      - uses: actions/setup-node@v3
+        with:
+          node-version: ${{ env.NODE_VERSION }}
+          cache: "yarn"
+          cache-dependency-path: "expo/package.json"
+      - uses: expo/expo-github-action@v8
+        with:
+          eas-version: ${{ env.EAS_VERSION }}
+          token: ${{ secrets.EXPO_TOKEN }}
+      - uses: actions/download-artifact@v4
+        with:
+          name: hpapp-${{ matrix.target }}.aab
+          path: ${{ github.workspace }}/expo/build/
+      - run: cd expo && yarn install
+      - run: cd expo && rm ./config/${{ matrix.target }}/.gitignore
+      - run: cd expo && rm ./.gitignore
+      - run: cd expo && envsubst < ./config/eas.json.env > ./config/eas.json
+        env:
+          EAS_SUBMIT: ${{ secrets.EAS_SUBMIT }}
+      - run: cd expo && envsubst < ./config/PlayStoreKey.json.env > ./config/PlayStoreKey.json
         env:
           EAS_SUBMIT: ${{ secrets.EAS_SUBMIT }}
+          PLAY_STORE_KEY: ${{ secrets.PLAY_STORE_KEY }}
+      - run: cd expo && ./scripts/eas.sh submit --profile ${{ matrix.target }} --platform android --non-interactive --path ${{ github.workspace }}/expo/build/hpapp-${{ matrix.target }}.aab
+        if: ${{ matrix.target != 'dev' }}
+        env:
+          HPAPP_CONFIG_NAME: ${{ matrix.target }}
+          EXPO_APPLE_APP_SPECIFIC_PASSWORD: ${{ secrets.EXPO_APPLE_APP_SPECIFIC_PASSWORD }}
diff --git a/.github/workflows/eas-build-debug.yml b/.github/workflows/eas-build-debug.yml
new file mode 100644
index 0000000..7fd559f
--- /dev/null
+++ b/.github/workflows/eas-build-debug.yml
@@ -0,0 +1,35 @@
+name: EAS - Build Debug
+on:
+  workflow_dispatch:
+    inputs:
+      dev:
+        description: "HPAPP_CONFIG_NAME=dev"
+        required: false
+        type: boolean
+        default: false
+      beta:
+        description: "HPAPP_CONFIG_NAME=beta"
+        required: false
+        type: boolean
+        default: false
+      prod:
+        description: "HPAPP_CONFIG_NAME=prod"
+        required: false
+        type: boolean
+        default: false
+env:
+  NODE_VERSION: 22.3.0
+  EAS_VERSION: 13.4.2
+  JAVA_VERSION: 17
+jobs:
+  test:
+    if: ${{ github.event.inputs.dev == true }}
+    runs-on: ubuntu-latest
+    permissions:
+      contents: "read"
+      id-token: "write"
+    environment:
+      name: gcp-go
+    steps:
+      - uses: actions/checkout@v3
+      - run: echo ${{ github.event.inputs.dev }}
diff --git a/.github/workflows/eas-build-ios.yml b/.github/workflows/eas-build-ios.yml
index c243575..f5955c7 100644
--- a/.github/workflows/eas-build-ios.yml
+++ b/.github/workflows/eas-build-ios.yml
@@ -59,33 +59,58 @@ jobs:
           eas-version: ${{ env.EAS_VERSION }}
           token: ${{ secrets.EXPO_TOKEN }}
       - run: cd expo && rm ./config/${{ matrix.target }}/.gitignore
+      - run: cd expo && rm ./.gitignore
       - run: cd expo && yarn install
       - run: cd expo && envsubst < ./.env > ./.env.local
         env:
           APP_CHECK_DEBUG_TOKEN: ${{ secrets.APP_CHECK_DEBUG_TOKEN }}
           GRAPHQL_ENDPOINT: ${{ secrets.GRAPHQL_ENDPOINT }}
-      - run: cd expo && ./scripts/eas.sh build --profile ${{ matrix.target }} --platform ios --non-interactive --local --output ./build/hpapp-${{ matrix.target }}.ipa
+      - run: cd expo && ./scripts/eas.sh build --profile ${{ matrix.target }} --platform ios --non-interactive --local --output ${{ github.workspace }}/expo/build/hpapp-${{ matrix.target }}.ipa
         env:
           HPAPP_CONFIG_NAME: ${{ matrix.target }}
           GOOGLE_SERVICES_INFO_PLIST: ${{ secrets.GOOGLE_SERVICES_INFO_PLIST }}
           GOOGLE_SERVICES_JSON: ${{ secrets.GOOGLE_SERVICES_JSON }}
-      # upload artifacts
       - uses: actions/upload-artifact@v4
         with:
           name: hpapp-${{ matrix.target }}.ipa
           path: ${{ github.workspace }}/expo/build/hpapp-${{ matrix.target }}.ipa
-      # [beta/prod] submit
+  submit:
+    needs: [generate-matrix, build]
+    strategy:
+      matrix:
+        target: ${{ fromJson(needs.generate-matrix.outputs.target) }}
+        exclude:
+          - target: dev
+    runs-on: ubuntu-latest
+    environment:
+      name: eas-${{ matrix.target }}
+    steps:
+      - uses: actions/checkout@v3
+      - uses: actions/setup-node@v3
+        with:
+          node-version: ${{ env.NODE_VERSION }}
+          cache: "yarn"
+          cache-dependency-path: "expo/package.json"
+      - uses: expo/expo-github-action@v8
+        with:
+          eas-version: ${{ env.EAS_VERSION }}
+          token: ${{ secrets.EXPO_TOKEN }}
+      - uses: actions/download-artifact@v4
+        with:
+          name: hpapp-${{ matrix.target }}.ipa
+          path: ${{ github.workspace }}/expo/build/
+      - run: cd expo && yarn install
+      - run: cd expo && rm ./config/${{ matrix.target }}/.gitignore
+      - run: cd expo && rm ./.gitignore
       - run: cd expo && envsubst < ./config/eas.json.env > ./config/eas.json
-        if: ${{ matrix.target != 'dev' }}
         env:
           EAS_SUBMIT: ${{ secrets.EAS_SUBMIT }}
       - run: cd expo && envsubst < ./config/AppStoreKey.p8.env > ./config/AppStoreKey.p8
-        if: ${{ matrix.target != 'dev' }}
         env:
           EAS_SUBMIT: ${{ secrets.EAS_SUBMIT }}
           APP_STORE_KEY: ${{ secrets.APP_STORE_KEY }}
-      - run: cd expo && ./scripts/eas.sh submit --profile ${{ matrix.target }} --platform ios --non-interactive --path ./build/hpapp-${{ matrix.target }}.ipa
+      - run: cd expo && ./scripts/eas.sh submit --profile ${{ matrix.target }} --platform ios --non-interactive --path ${{ github.workspace }}/expo/build/hpapp-${{ matrix.target }}.ipa
         if: ${{ matrix.target != 'dev' }}
         env:
           HPAPP_CONFIG_NAME: ${{ matrix.target }}
-          EXPO_APPLE_APP_SPECIFIC_PASSWORD: ${{ secret.EXPO_APPLE_APP_SPECIFIC_PASSWORD }}
+          EXPO_APPLE_APP_SPECIFIC_PASSWORD: ${{ secrets.EXPO_APPLE_APP_SPECIFIC_PASSWORD }}
diff --git a/.github/workflows/eas-ota-update-auto.yml b/.github/workflows/eas-ota-update-auto.yml
index 1d88d16..384b099 100644
--- a/.github/workflows/eas-ota-update-auto.yml
+++ b/.github/workflows/eas-ota-update-auto.yml
@@ -17,17 +17,19 @@ jobs:
       - uses: actions/checkout@v3
       - uses: actions/setup-node@v3
         with:
-          node-version: "22.3.0"
+          node-version: ${{ env.NODE_VERSION }}
           cache: "yarn"
           cache-dependency-path: "expo/package.json"
       - uses: expo/expo-github-action@v8
         with:
-          eas-version: 13.4.2
+          eas-version: ${{ env.EAS_VERSION }}
           token: ${{ secrets.EXPO_TOKEN }}
+      - run: cd expo && rm ./config/${{ matrix.target }}/.gitignore
+      - run: cd expo && rm ./.gitignore
       - run: cd expo && yarn install
+      - run: cd expo && envsubst < ./.env > ./.env.local
       - run: cd expo && ./scripts/eas.sh update --channel beta --non-interactive --auto
         env:
           HPAPP_CONFIG_NAME: beta
-          SECRETS_JSON: ${{ secrets.SECRETS_JSON }}
           GOOGLE_SERVICES_INFO_PLIST: ${{ secrets.GOOGLE_SERVICES_INFO_PLIST }}
           GOOGLE_SERVICES_JSON: ${{ secrets.GOOGLE_SERVICES_JSON }}
diff --git a/.github/workflows/eas-ota-update-manual.yml b/.github/workflows/eas-ota-update-manual.yml
index 3202abb..ea5ef46 100644
--- a/.github/workflows/eas-ota-update-manual.yml
+++ b/.github/workflows/eas-ota-update-manual.yml
@@ -11,6 +11,10 @@ on:
           - beta
           - prod
 
+env:
+  NODE_VERSION: 22.3.0
+  EAS_VERSION: 13.4.2
+  JAVA_VERSION: 17
 jobs:
   update:
     runs-on: ubuntu-latest
@@ -20,17 +24,20 @@ jobs:
       - uses: actions/checkout@v3
       - uses: actions/setup-node@v3
         with:
-          node-version: "22.3.0"
+          node-version: ${{ env.NODE_VERSION }}
           cache: "yarn"
           cache-dependency-path: "expo/package.json"
       - uses: expo/expo-github-action@v8
         with:
-          eas-version: 13.4.2
+          eas-version: ${{ env.EAS_VERSION }}
           token: ${{ secrets.EXPO_TOKEN }}
       - run: cd expo && yarn install
+      - run: cd expo && rm ./config/${{ matrix.target }}/.gitignore
+      - run: cd expo && rm ./.gitignore
+      - run: cd expo && yarn install
+      - run: cd expo && envsubst < ./.env > ./.env.local
       - run: cd expo && ./scripts/eas.sh update --channel ${{inputs.config}} --non-interactive --auto
         env:
           HPAPP_CONFIG_NAME: ${{inputs.config}}
-          SECRETS_JSON: ${{ secrets.SECRETS_JSON }}
           GOOGLE_SERVICES_INFO_PLIST: ${{ secrets.GOOGLE_SERVICES_INFO_PLIST }}
           GOOGLE_SERVICES_JSON: ${{ secrets.GOOGLE_SERVICES_JSON }}
diff --git a/docs/expo/development.md b/docs/expo/development.md
new file mode 100644
index 0000000..e9edce2
--- /dev/null
+++ b/docs/expo/development.md
@@ -0,0 +1,36 @@
+# iOS/Android development
+
+## Install development build
+
+### for iOS
+
+Scan the QR code below or open [iTunes Link](itms-services://?action=download-manifest;url=https://storage.googleapis.com/hpapp.yssk22.dev/hpapp-dev.plist) to install the development build.
+
+![iOS QR code](https://storage.googleapis.com/hpapp.yssk22.dev/artifacts/QR-hpapp-dev.png)
+
+### for Android
+
+Scan the QR code below or open [iTunes Link](itms-services://?action=download-manifest;url=https://storage.googleapis.com/hpapp.yssk22.dev/hpapp-dev.plist) to install the development build.
+
+![Android QR](https://storage.googleapis.com/hpapp.yssk22.dev/artifacts/QR-hpapp-android-dev.png)
+
+## Start a development server
+
+```bash
+$ cloud_sql_proxy -instances=${GCP_PROJECT}:asia-northeast1:${GCP_DB}=tcp:3306
+$ cd go
+$ go run ./cmd/ --prod httpserver
+```
+
+## Start a metro bundler
+
+```bash
+$ cd expo
+$ yarn install
+$ export APP_CHECK_DEBUG_TOKEN=****
+$ export GRAPHQL_ENDPOINT=http://{development_server}:8080
+$ envsubst < ./.env > ./.env.local
+$ yarn start
+```
+
+now you can launch the app on your device and connect to the metro bundler
diff --git a/expo/app.config.js b/expo/app.config.js
index d36930f..d6cc25a 100644
--- a/expo/app.config.js
+++ b/expo/app.config.js
@@ -1,4 +1,3 @@
-const fs = require('fs');
 const path = require('path');
 
 const config = require('./app.config.default').expo;
@@ -12,26 +11,12 @@ module.exports = (_) => {
   // set resources located in config/{name}/ directory
   config.icon = path.join('config', cfgName, 'icon.png');
   config.splash.image = path.join('config', cfgName, 'splash.png');
-
-  const isEAS = process.env.EAS_BUILD === 'true';
-  const iosGoogleServicesFilePath = path.join('config', cfgName, 'GoogleService-Info.plist');
-  const androidGoogleServicesFilePath = path.join('config', cfgName, 'google-services.json');
-
-  if (fs.existsSync(iosGoogleServicesFilePath)) {
-    config.ios.googleServicesFile = iosGoogleServicesFilePath;
-  } else {
-    throw new Error('GoogleService-Info.plist file does not found in ' + iosGoogleServicesFilePath);
-  }
-  if (fs.existsSync(androidGoogleServicesFilePath)) {
-    config.android.googleServicesFile = androidGoogleServicesFilePath;
-  } else {
-    throw new Error('google-services.json file does not found in ' + androidGoogleServicesFilePath);
-  }
+  config.ios.googleServicesFile = path.join('config', cfgName, 'GoogleService-Info.plist');
+  config.android.googleServicesFile = path.join('config', cfgName, 'google-services.json');
 
   // finally load the environment specific app.config.js
   const configure = require('./' + path.join('config', cfgName, 'app.config.js'));
 
   // reserverd extra configurations
-  config.extra.hpapp.isEAS = isEAS;
   return configure(config);
 };
diff --git a/expo/config/.gitignore b/expo/config/.gitignore
index 6d309f0..f89e16c 100644
--- a/expo/config/.gitignore
+++ b/expo/config/.gitignore
@@ -6,4 +6,5 @@
 !google-services.json.env
 !GoogleService-Info.plist.env
 !AppStoreKey.p8.env
+!PlayStoreKey.json.env
 !.gitignore
diff --git a/expo/config/PlayStoreKey.json.env b/expo/config/PlayStoreKey.json.env
new file mode 100644
index 0000000..feaace5
--- /dev/null
+++ b/expo/config/PlayStoreKey.json.env
@@ -0,0 +1 @@
+$PLAY_STORE_KEY
\ No newline at end of file
diff --git a/expo/config/dev/hpapp-dev.plist b/expo/config/dev/hpapp-dev.plist
new file mode 100644
index 0000000..d323c39
--- /dev/null
+++ b/expo/config/dev/hpapp-dev.plist
@@ -0,0 +1,52 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!-- 
+  This is a file for iOS devices to install ipa without App Storre. 
+
+  - Upload this plist file to https://storage.googleapis.com/hpapp.yssk22.dev/artifacts/hpapp-dev.plist
+  - Upload the dev build (.ipa) to https://storage.googleapis.com/hpapp.yssk22.dev/artifacts/hpapp-dev.ipa
+  - Upload the icon.png to https://storage.googleapis.com/hpapp.yssk22.dev/artifacts/hpapp-dev.png
+  - Open `itms-services://?action=download-manifest;url=https://storage.googleapis.com/hpapp.yssk22.dev/artifacts/hpapp-dev.plist` in Safari to download and install. 
+
+-->
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+  <dict>
+    <key>items</key>
+    <array>
+      <dict>
+        <key>assets</key>
+        <array>
+          <dict>
+            <key>kind</key>
+            <string>software-package</string>
+            <key>url</key>
+            <string>https://storage.googleapis.com/hpapp.yssk22.dev/artifacts/hpapp-dev.ipa</string>
+          </dict>
+          <dict>
+            <key>kind</key>
+            <string>display-image</string>
+            <key>url</key>
+            <string>https://storage.googleapis.com/hpapp.yssk22.dev/artifacts/hpapp-dev.png</string>
+          </dict>
+          <dict>
+            <key>kind</key>
+            <string>full-size-image</string>
+            <key>url</key>
+            <string>https://storage.googleapis.com/hpapp.yssk22.dev/artifacts/hpapp-dev.png</string>
+          </dict>
+        </array>
+        <key>metadata</key>
+        <dict>
+          <key>bundle-identifier</key>
+          <string>dev.yssk22.hpapp.dev</string>
+          <key>bundle-version</key>
+          <string>1.0</string>
+          <key>kind</key>
+          <string>software</string>
+          <key>title</key>
+          <string>HELLO!FAN (DEV)</string>
+        </dict>
+      </dict>
+    </array>
+  </dict>
+</plist>
\ No newline at end of file