diff --git a/scripts/build_lib.sh b/scripts/build_lib.sh
new file mode 100755
index 0000000..332a5ef
--- /dev/null
+++ b/scripts/build_lib.sh
@@ -0,0 +1,64 @@
+#!/bin/bash
+
+# This script is used to locally build Android .aar library and iOS .xcframework from ctrld source using go mobile tool.
+
+# Requirements:
+#   - Android NDK (version 23+)
+#   - Android SDK (version 33+)
+#   - Xcode 15 + Build tools
+#   - Go 1.21
+#   - Git
+# usage: $ ./build_lib.sh v1.3.4
+
+TAG="$1"
+# Hacky way to replace version info.
+update_versionInfo() {
+    local file="$1/ctrld/cmd/cli/cli.go"
+    local tag="$2"
+    local commit="$3"
+    awk -v tag="$tag" -v commit="$commit" '
+        BEGIN { version_updated = 0; commit_updated = 0 }
+        /^\tversion/ {
+            sub(/= ".+"/, "= \"" tag "\"");
+            version_updated = 1;
+        }
+        /^\tcommit/ {
+            sub(/= ".+"/, "= \"" commit "\"");
+            commit_updated = 1;
+        }
+        { print }
+        END {
+            if (version_updated == 0) {
+                print "\tversion = \"" tag "\"";
+            }
+            if (commit_updated == 0) {
+                print "\tcommit = \"" commit "\"";
+            }
+        }
+    ' "$file" > "$file.tmp" && mv "$file.tmp" "$file"
+}
+export ANDROID_NDK_HOME=~/Library/Android/sdk/ndk/23.0.7599858
+mkdir bin
+cd bin || exit
+root=$(pwd)
+# Get source from github and switch to tag
+git clone --depth 1 --branch "$TAG" https://github.com/Control-D-Inc/ctrld.git
+# Prepare gomobile tool
+sourcePath=./ctrld/cmd/ctrld_library
+cd $sourcePath || exit
+go mod tidy
+go install golang.org/x/mobile/cmd/gomobile@latest
+go get golang.org/x/mobile/bind
+gomobile init
+# Prepare build info
+buildDir=$root/../build
+mkdir -p "$buildDir"
+COMMIT=$(git rev-parse HEAD)
+update_versionInfo "$root" "$TAG" "$COMMIT"
+ldflags="-s -w"
+# Build
+gomobile bind -target ios/arm64 -ldflags="$ldflags" -o "$buildDir"/ctrld-"$TAG".xcframework || exit
+gomobile bind -ldflags="$ldflags" -o "$buildDir"/ctrld-"$TAG".aar || exit
+# Clean up
+rm -r "$root"
+echo "Successfully built Ctrld library $TAG($COMMIT)."
\ No newline at end of file