diff --git a/.cargo/config.toml b/.cargo/config.toml
index caa816c..abb061f 100644
--- a/.cargo/config.toml
+++ b/.cargo/config.toml
@@ -1,4 +1,3 @@
-
 # Previously we added this to rustflags for all linux builds:
 #   "-C", "link-arg=-lgcc_eh"
 # It was to fix this error when loading the loadable extension:
@@ -86,3 +85,18 @@ rustflags = [
 rustflags = [
     "-C", "link-arg=-Wl,-soname,libpowersync.so",
 ]
+
+[target.aarch64-apple-watchos]
+rustflags = [
+    "-C", "link-arg=-mwatchos-version-min=9.0",
+]
+
+[target.aarch64-apple-watchos-sim]
+rustflags = [
+    "-C", "link-arg=-mwatchsimulator-version-min=9.0",
+]
+
+[target.x86_64-apple-watchos-sim]
+rustflags = [
+    "-C", "link-arg=-mwatchos-version-min=9.0",
+]
diff --git a/.gitignore b/.gitignore
index 5fee65f..f7f55d4 100644
--- a/.gitignore
+++ b/.gitignore
@@ -9,3 +9,4 @@ target/
 *.tar.gz
 *.tar.xz
 *.zip
+.build
diff --git a/Cargo.lock b/Cargo.lock
index 303b7ec..4c08108 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -273,6 +273,14 @@ dependencies = [
  "sqlite_nostd",
 ]
 
+[[package]]
+name = "powersync_static"
+version = "0.4.0"
+dependencies = [
+ "powersync_core",
+ "sqlite_nostd",
+]
+
 [[package]]
 name = "prettyplease"
 version = "0.2.32"
diff --git a/Cargo.toml b/Cargo.toml
index a802bd4..e0baca7 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -38,3 +38,4 @@ repository = "https://github.com/powersync-ja/powersync-sqlite-core"
 
 [workspace.dependencies]
 sqlite_nostd = { path="./sqlite-rs-embedded/sqlite_nostd" }
+
diff --git a/Package.swift b/Package.swift
new file mode 100644
index 0000000..498c829
--- /dev/null
+++ b/Package.swift
@@ -0,0 +1,26 @@
+// swift-tools-version: 5.7
+
+// NOTE! This is never released, we're only using this to support local builds builds for the
+// Swift SDK.
+import PackageDescription
+let packageName = "PowerSyncSQLiteCore"
+
+let package = Package(
+    name: packageName,
+    platforms: [
+        .iOS(.v13),
+        .macOS(.v10_15),
+        .watchOS(.v9)
+    ],
+    products: [
+        .library(
+            name: packageName,
+            targets: [packageName]),
+    ],
+    targets: [
+        .binaryTarget(
+            name: packageName,
+            path: "powersync-sqlite-core.xcframework"
+        )
+    ]
+)
diff --git a/crates/static/Cargo.toml b/crates/static/Cargo.toml
new file mode 100644
index 0000000..cc7e0f3
--- /dev/null
+++ b/crates/static/Cargo.toml
@@ -0,0 +1,24 @@
+[package]
+name = "powersync_static"
+edition.workspace = true
+version.workspace = true
+homepage.workspace = true
+repository.workspace = true
+license.workspace = true
+authors.workspace = true
+keywords.workspace = true
+
+[lib]
+name = "powersync"
+crate-type = ["staticlib"]
+
+[dependencies]
+sqlite_nostd = { workspace=true }
+
+[dependencies.powersync_core]
+path = "../core"
+default-features = false
+features = []
+
+[features]
+default = ["powersync_core/static", "powersync_core/omit_load_extension", "sqlite_nostd/omit_load_extension"]
diff --git a/crates/static/README.md b/crates/static/README.md
new file mode 100644
index 0000000..07aefdd
--- /dev/null
+++ b/crates/static/README.md
@@ -0,0 +1 @@
+Builds the core extension as a static library, exposing the `powersync_init_static` function to load it.
diff --git a/crates/static/src/lib.rs b/crates/static/src/lib.rs
new file mode 100644
index 0000000..9e5a9de
--- /dev/null
+++ b/crates/static/src/lib.rs
@@ -0,0 +1,31 @@
+#![no_std]
+#![feature(vec_into_raw_parts)]
+#![feature(core_intrinsics)]
+#![allow(internal_features)]
+#![feature(lang_items)]
+
+extern crate alloc;
+
+// Defines sqlite3_powersync_init
+#[allow(unused_imports)]
+use powersync_core;
+
+// Use the SQLite allocator, allowing us to freely transfer memory between SQLite and Rust.
+#[cfg(not(test))]
+use sqlite_nostd::SQLite3Allocator;
+
+#[cfg(not(test))]
+#[global_allocator]
+static ALLOCATOR: SQLite3Allocator = SQLite3Allocator {};
+
+// Custom Panic handler for WASM and other no_std builds
+#[cfg(not(test))]
+#[panic_handler]
+fn panic(_info: &core::panic::PanicInfo) -> ! {
+    core::intrinsics::abort()
+}
+
+#[cfg(not(target_family = "wasm"))]
+#[cfg(not(test))]
+#[lang = "eh_personality"]
+extern "C" fn eh_personality() {}
diff --git a/powersync-sqlite-core.podspec b/powersync-sqlite-core.podspec
index 27040b5..5075a6c 100644
--- a/powersync-sqlite-core.podspec
+++ b/powersync-sqlite-core.podspec
@@ -13,7 +13,7 @@ PowerSync extension for SQLite.
   s.source   = { :http => "https://github.com/powersync-ja/powersync-sqlite-core/releases/download/v#{s.version}/powersync-sqlite-core.xcframework.zip" }
   s.vendored_frameworks  = 'powersync-sqlite-core.xcframework'
 
-
   s.ios.deployment_target = '11.0'
   s.osx.deployment_target = '10.13'
+  s.watchos.deployment_target = '9.0'
 end
diff --git a/tool/build_xcframework.sh b/tool/build_xcframework.sh
index 37619a7..d377f9d 100755
--- a/tool/build_xcframework.sh
+++ b/tool/build_xcframework.sh
@@ -3,12 +3,48 @@ set -e
 
 # Adapted from https://github.com/vlcn-io/cr-sqlite/blob/main/core/all-ios-loadable.sh
 
-
 BUILD_DIR=./build
-DIST_PACKAGE_DIR=./dist
+TARGETS=(
+  # iOS and simulator
+  aarch64-apple-ios
+  aarch64-apple-ios-sim
+  x86_64-apple-ios
 
-function createXcframework() {
-  plist=$(cat << EOF
+  # macOS
+  aarch64-apple-darwin
+  x86_64-apple-darwin
+
+  # watchOS and simulator
+  aarch64-apple-watchos
+  aarch64-apple-watchos-sim
+  x86_64-apple-watchos-sim
+  arm64_32-apple-watchos
+)
+VERSION=0.4.0
+
+function generatePlist() {
+  min_os_version=0
+  additional_keys=""
+  # We support versions 11.0 or later for iOS and macOS. For watchOS, we need 9.0 or later.
+  case $1 in
+    *"watchos"*)
+      additional_keys=$(cat <<EOF
+	<key>CFBundleSupportedPlatforms</key>
+	<array>
+		<string>WatchOS</string>
+	</array>
+	<key>UIDeviceFamily</key>
+	<array>
+		<integer>4</integer>
+	</array>
+EOF
+      )
+      min_os_version="9.0";;
+    *)
+      min_os_version="11.0";;
+  esac
+
+  cat <<EOF
 <?xml version="1.0" encoding="UTF-8"?>
 <!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
 <plist version="1.0">
@@ -26,18 +62,25 @@ function createXcframework() {
   <key>CFBundleSignature</key>
   <string>????</string>
   <key>MinimumOSVersion</key>
-  <string>11.0</string>
+  <string>$min_os_version</string>
   <key>CFBundleVersion</key>
-  <string>0.4.0</string>
+  <string>$VERSION</string>
   <key>CFBundleShortVersionString</key>
-  <string>0.4.0</string>
+  <string>$VERSION</string>
+$additional_keys
 </dict>
 </plist>
 EOF
-)
+}
+
+function createXcframework() {
+  ios_plist=$(generatePlist "ios")
+  macos_plist=$(generatePlist "macos")
+  watchos_plist=$(generatePlist "watchos")
+
   echo "===================== create ios device framework ====================="
   mkdir -p "${BUILD_DIR}/ios-arm64/powersync-sqlite-core.framework"
-  echo "${plist}" > "${BUILD_DIR}/ios-arm64/powersync-sqlite-core.framework/Info.plist"
+  echo "${ios_plist}" > "${BUILD_DIR}/ios-arm64/powersync-sqlite-core.framework/Info.plist"
   cp -f "./target/aarch64-apple-ios/release_apple/libpowersync.dylib" "${BUILD_DIR}/ios-arm64/powersync-sqlite-core.framework/powersync-sqlite-core"
   install_name_tool -id "@rpath/powersync-sqlite-core.framework/powersync-sqlite-core" "${BUILD_DIR}/ios-arm64/powersync-sqlite-core.framework/powersync-sqlite-core"
   # Generate dSYM for iOS Device
@@ -45,7 +88,7 @@ EOF
 
   echo "===================== create ios simulator framework ====================="
   mkdir -p "${BUILD_DIR}/ios-arm64_x86_64-simulator/powersync-sqlite-core.framework"
-  echo "${plist}" > "${BUILD_DIR}/ios-arm64_x86_64-simulator/powersync-sqlite-core.framework/Info.plist"
+  echo "${ios_plist}" > "${BUILD_DIR}/ios-arm64_x86_64-simulator/powersync-sqlite-core.framework/Info.plist"
   lipo ./target/aarch64-apple-ios-sim/release_apple/libpowersync.dylib ./target/x86_64-apple-ios/release_apple/libpowersync.dylib -create -output "${BUILD_DIR}/ios-arm64_x86_64-simulator/powersync-sqlite-core.framework/powersync-sqlite-core"
   install_name_tool -id "@rpath/powersync-sqlite-core.framework/powersync-sqlite-core" "${BUILD_DIR}/ios-arm64_x86_64-simulator/powersync-sqlite-core.framework/powersync-sqlite-core"
   # Generate dSYM for iOS Simulator
@@ -53,7 +96,7 @@ EOF
 
   echo "===================== create macos framework ====================="
   mkdir -p "${BUILD_DIR}/macos-arm64_x86_64/powersync-sqlite-core.framework/Versions/A/Resources"
-  echo "${plist}" > "${BUILD_DIR}/macos-arm64_x86_64/powersync-sqlite-core.framework/Versions/A/Resources/Info.plist"
+  echo "${ios_plist}" > "${BUILD_DIR}/macos-arm64_x86_64/powersync-sqlite-core.framework/Versions/A/Resources/Info.plist"
   lipo ./target/x86_64-apple-darwin/release_apple/libpowersync.dylib ./target/aarch64-apple-darwin/release_apple/libpowersync.dylib -create -output "${BUILD_DIR}/macos-arm64_x86_64/powersync-sqlite-core.framework/Versions/A/powersync-sqlite-core"
   install_name_tool -id "@rpath/powersync-sqlite-core.framework/powersync-sqlite-core" "${BUILD_DIR}/macos-arm64_x86_64/powersync-sqlite-core.framework/Versions/A/powersync-sqlite-core"
   ln -sf A "${BUILD_DIR}/macos-arm64_x86_64/powersync-sqlite-core.framework/Versions/Current"
@@ -62,9 +105,27 @@ EOF
   # Generate dSYM for macOS
   dsymutil "${BUILD_DIR}/macos-arm64_x86_64/powersync-sqlite-core.framework/Versions/A/powersync-sqlite-core" -o "${BUILD_DIR}/macos-arm64_x86_64/powersync-sqlite-core.framework.dSYM"
 
+  echo "===================== create watchos device framework ====================="
+  mkdir -p "${BUILD_DIR}/watchos-arm64_arm64_32_armv7k/powersync-sqlite-core.framework/Versions/A/Resources"
+  echo "${watchos_plist}" > "${BUILD_DIR}/watchos-arm64_arm64_32_armv7k/powersync-sqlite-core.framework/Versions/A/Resources/Info.plist"
+  lipo ./target/aarch64-apple-watchos/release_apple/libpowersync.a ./target/arm64_32-apple-watchos/release_apple/libpowersync.a -create -output "${BUILD_DIR}/watchos-arm64_arm64_32_armv7k/powersync-sqlite-core.framework/Versions/A/powersync-sqlite-core"
+  # install_name_tool isn't necessary, we use a statically-linked library
+  ln -sf A "${BUILD_DIR}/watchos-arm64_arm64_32_armv7k/powersync-sqlite-core.framework/Versions/Current"
+  ln -sf Versions/Current/powersync-sqlite-core "${BUILD_DIR}/watchos-arm64_arm64_32_armv7k/powersync-sqlite-core.framework/powersync-sqlite-core"
+  ln -sf Versions/Current/Resources "${BUILD_DIR}/watchos-arm64_arm64_32_armv7k/powersync-sqlite-core.framework/Resources"
+
+  echo "===================== create watchos simulator framework ====================="
+  mkdir -p "${BUILD_DIR}/watchos-arm64_x86_64-simulator/powersync-sqlite-core.framework/Versions/A/Resources"
+  echo "${watchos_plist}" > "${BUILD_DIR}/watchos-arm64_x86_64-simulator/powersync-sqlite-core.framework/Versions/A/Resources/Info.plist"
+  lipo ./target/aarch64-apple-watchos-sim/release_apple/libpowersync.a ./target/x86_64-apple-watchos-sim/release_apple/libpowersync.a -create -output "${BUILD_DIR}/watchos-arm64_x86_64-simulator/powersync-sqlite-core.framework/Versions/A/powersync-sqlite-core"
+  # install_name_tool isn't necessary, we use a statically-linked library
+  ln -sf A "${BUILD_DIR}/watchos-arm64_x86_64-simulator/powersync-sqlite-core.framework/Versions/Current"
+  ln -sf Versions/Current/powersync-sqlite-core "${BUILD_DIR}/watchos-arm64_x86_64-simulator/powersync-sqlite-core.framework/powersync-sqlite-core"
+  ln -sf Versions/Current/Resources "${BUILD_DIR}/watchos-arm64_x86_64-simulator/powersync-sqlite-core.framework/Resources"
+
   echo "===================== create xcframework ====================="
   rm -rf "${BUILD_DIR}/powersync-sqlite-core.xcframework"
-  # "-debug-symbols" requires the absolute path
+
   xcodebuild -create-xcframework \
     -framework "${BUILD_DIR}/ios-arm64/powersync-sqlite-core.framework" \
     -debug-symbols "$(pwd -P)/${BUILD_DIR}/ios-arm64/powersync-sqlite-core.framework.dSYM" \
@@ -72,7 +133,9 @@ EOF
     -debug-symbols "$(pwd -P)/${BUILD_DIR}/ios-arm64_x86_64-simulator/powersync-sqlite-core.framework.dSYM" \
     -framework "${BUILD_DIR}/macos-arm64_x86_64/powersync-sqlite-core.framework" \
     -debug-symbols "$(pwd -P)/${BUILD_DIR}/macos-arm64_x86_64/powersync-sqlite-core.framework.dSYM" \
-    -output "${BUILD_DIR}/powersync-sqlite-core.xcframework" \
+    -framework "${BUILD_DIR}/watchos-arm64_arm64_32_armv7k/powersync-sqlite-core.framework" \
+    -framework "${BUILD_DIR}/watchos-arm64_x86_64-simulator/powersync-sqlite-core.framework" \
+    -output "${BUILD_DIR}/powersync-sqlite-core.xcframework"
 
   cp -Rf "${BUILD_DIR}/powersync-sqlite-core.xcframework" "powersync-sqlite-core.xcframework"
   zip -r --symlinks powersync-sqlite-core.xcframework.zip powersync-sqlite-core.xcframework LICENSE README.md
@@ -84,13 +147,18 @@ EOF
 
 rm -rf powersync-sqlite-core.xcframework
 
-# iOS
-cargo build -p powersync_loadable --profile release_apple --target aarch64-apple-ios -Zbuild-std
-# Simulator
-cargo build -p powersync_loadable --profile release_apple --target aarch64-apple-ios-sim -Zbuild-std
-cargo build -p powersync_loadable --profile release_apple --target x86_64-apple-ios -Zbuild-std
-# macOS
-cargo build -p powersync_loadable --profile release_apple --target aarch64-apple-darwin -Zbuild-std
-cargo build -p powersync_loadable --profile release_apple --target x86_64-apple-darwin -Zbuild-std
+for TARGET in ${TARGETS[@]}; do
+  echo "Building PowerSync loadable extension for $TARGET"
+
+  if [[ $TARGET == *"watchos"* ]]; then
+    cargo build \
+      -p powersync_static \
+      --profile release_apple \
+      --target $TARGET \
+      -Zbuild-std
+  else
+    cargo build -p powersync_loadable --profile release_apple --target $TARGET -Zbuild-std
+  fi
+done
 
 createXcframework