diff --git a/ios/Stemify/Resources/Assets.xcassets/AppIconDev.appiconset/Contents.json b/ios/Stemify/Resources/Assets.xcassets/AppIconDev.appiconset/Contents.json
new file mode 100644
index 0000000..7c85906
--- /dev/null
+++ b/ios/Stemify/Resources/Assets.xcassets/AppIconDev.appiconset/Contents.json
@@ -0,0 +1 @@
+{"images":[{"filename":"icon.png","idiom":"universal","platform":"ios","size":"1024x1024"}],"info":{"author":"xcode","version":1}}
diff --git a/ios/Stemify/Resources/Assets.xcassets/AppIconDev.appiconset/icon.png b/ios/Stemify/Resources/Assets.xcassets/AppIconDev.appiconset/icon.png
new file mode 100644
index 0000000..4b05ee9
Binary files /dev/null and b/ios/Stemify/Resources/Assets.xcassets/AppIconDev.appiconset/icon.png differ
diff --git a/ios/project.yml b/ios/project.yml
index 11c54ca..1790b11 100644
--- a/ios/project.yml
+++ b/ios/project.yml
@@ -13,6 +13,7 @@ settings:
     # Dev builds override these (build-ipa.sh dev) so they install next to the release app.
     APP_ID: org.cdnutter.stemify
     APP_NAME: Stemify
+    APP_ICON: AppIcon
 targets:
   Stemify:
     type: application
@@ -24,7 +25,7 @@ targets:
       base:
         PRODUCT_BUNDLE_IDENTIFIER: $(APP_ID)
         TARGETED_DEVICE_FAMILY: "1"
-        ASSETCATALOG_COMPILER_APPICON_NAME: AppIcon
+        ASSETCATALOG_COMPILER_APPICON_NAME: $(APP_ICON)
         CODE_SIGN_ENTITLEMENTS: Stemify/Stemify.entitlements
     entitlements:
       path: Stemify/Stemify.entitlements
diff --git a/ios/scripts/build-ipa.sh b/ios/scripts/build-ipa.sh
index a9b6170..8bb6eb9 100755
--- a/ios/scripts/build-ipa.sh
+++ b/ios/scripts/build-ipa.sh
@@ -11,8 +11,8 @@ cd "$(dirname "$0")/.."
 export PATH=/opt/homebrew/bin:$PATH
 B=build; OUT=$B/work; APP=$OUT/Payload/Stemify.app; EXT=$APP/PlugIns/StemifyWidgets.appex
 MODE=${1:-release}
-if [ "$MODE" = dev ]; then APP_ID=org.cdnutter.stemify-dev; APP_NAME="Stemify Dev"; DD=$B/dd-dev
-else APP_ID=org.cdnutter.stemify; APP_NAME=Stemify; DD=$B/dd; fi
+if [ "$MODE" = dev ]; then APP_ID=org.cdnutter.stemify-dev; APP_NAME="Stemify Dev"; APP_ICON=AppIconDev; DD=$B/dd-dev
+else APP_ID=org.cdnutter.stemify; APP_NAME=Stemify; APP_ICON=AppIcon; DD=$B/dd; fi
 rm -rf $OUT && mkdir -p $OUT/Payload $B/public $B/prov $B/dev
 # "1.0 RC 1" -> 1.0-rc1, used in file names and release tags.
 VERSION=$(sed -nE 's/^ *VERSION_LABEL: "(.*)"/\1/p' project.yml | tr 'A-Z' 'a-z' | sed -E 's/ rc /-rc/; s/ /-/g')
@@ -20,7 +20,7 @@ VERSION=$(sed -nE 's/^ *VERSION_LABEL: "(.*)"/\1/p' project.yml | tr 'A-Z' 'a-z'
 # xcodebuild compiles the app, the widget extension, the asset catalog and the App Intents metadata.
 xcodegen generate -q
 xcodebuild -project Stemify.xcodeproj -scheme Stemify -configuration Release -sdk iphoneos \
-  -destination generic/platform=iOS -derivedDataPath $DD APP_ID=$APP_ID APP_NAME="$APP_NAME" CODE_SIGNING_ALLOWED=NO -quiet build
+  -destination generic/platform=iOS -derivedDataPath $DD APP_ID=$APP_ID APP_NAME="$APP_NAME" APP_ICON=$APP_ICON CODE_SIGNING_ALLOWED=NO -quiet build
 cp -R $DD/Build/Products/Release-iphoneos/Stemify.app $APP
 [ -d $EXT ] || { echo "widget extension missing" >&2; exit 1; }