diff --git a/getpkg/src/main.cpp b/getpkg/src/main.cpp
index 255085f..c9bb0e4 100644
--- a/getpkg/src/main.cpp
+++ b/getpkg/src/main.cpp
@@ -157,11 +157,12 @@ int install_tool(int argc, char* argv[]) {
         tfile.close();
         
         std::string localHash = toolInfo.value("hash", "");
+        std::string localArch = toolInfo.value("arch", arch);
         
-        // Get remote hash to compare
+        // Get remote hash to compare - use the same arch that was originally installed
         GetbinClient getbin;
         std::string remoteHash;
-        if (getbin.getHash(toolName, arch, remoteHash) && !remoteHash.empty()) {
+        if (getbin.getHash(toolName, localArch, remoteHash) && !remoteHash.empty()) {
             if (localHash != remoteHash) {
                 needsUpdate = true;
                 std::cout << "Updating " << toolName << "..." << std::endl;
@@ -183,12 +184,19 @@ int install_tool(int argc, char* argv[]) {
     scriptManager.removeToolEntry(toolName);
     if (std::filesystem::exists(binDir)) std::filesystem::remove_all(binDir);
     
-    // Download tool
+    // Download tool - try arch-specific version first, then universal fallback
     GetbinClient getbin2;
+    std::string downloadArch = arch;
     std::cout << "Downloading " << toolName << ":" << arch << "..." << std::endl;
     if (!getbin2.download(toolName, arch, archivePath.string())) {
-        std::cerr << "Failed to download tool archive." << std::endl;
-        return 1;
+        // Try universal version as fallback
+        std::cout << "Arch-specific version not found, trying universal version..." << std::endl;
+        std::cout << "Downloading " << toolName << ":universal..." << std::endl;
+        if (!getbin2.download(toolName, "universal", archivePath.string())) {
+            std::cerr << "Failed to download tool archive (tried both " << arch << " and universal)." << std::endl;
+            return 1;
+        }
+        downloadArch = "universal";
     }
     
     // Unpack tool
@@ -207,7 +215,7 @@ int install_tool(int argc, char* argv[]) {
     
     // Get tool info
     std::string hash;
-    getbin2.getHash(toolName, arch, hash);
+    getbin2.getHash(toolName, downloadArch, hash);
     std::string version;
     std::string toolPath = binDir.string() + "/" + toolName;
     std::string versionCmd = shellEscape(toolPath) + " version";
@@ -231,7 +239,7 @@ int install_tool(int argc, char* argv[]) {
         {"name", toolName},
         {"version", version},
         {"hash", hash},
-        {"arch", arch}
+        {"arch", downloadArch}
     };
     std::ofstream toolInfoFile(toolInfoPath);
     toolInfoFile << toolInfo.dump(2);
@@ -256,6 +264,11 @@ int publish_tool(int argc, char* argv[]) {
     }
     std::string labeltag = argv[2];
     std::string folder = argv[3];
+    
+    // If no ARCH is provided (no colon in labeltag), append ":universal" for cross-platform tools
+    if (labeltag.find(':') == std::string::npos) {
+        labeltag += ":universal";
+    }
     std::string home = get_home();
     std::filesystem::path archivePath = std::filesystem::path(home) / ".tmp" / (labeltag + ".tgz");
     std::filesystem::create_directories(archivePath.parent_path());
diff --git a/getpkg/test.sh b/getpkg/test.sh
index cfdc03c..24debab 100755
--- a/getpkg/test.sh
+++ b/getpkg/test.sh
@@ -285,6 +285,25 @@ EOF
     else
         print_test_result "Publish tool without ARCH" 1
     fi
+    
+    # Test 12c: Install universal tool (arch fallback)
+    echo -e "\nTest 12c: Install universal tool (arch fallback)"
+    rm -rf ~/.config/getpkg/"${TEST_TOOL_NOARCH}.json" ~/.local/bin/getpkg/"${TEST_TOOL_NOARCH}" 2>/dev/null || true
+    FALLBACK_INSTALL_OUTPUT=$(timeout 3 "$GETPKG" install "${TEST_TOOL_NOARCH}" 2>&1) || FALLBACK_INSTALL_OUTPUT=""
+    if [[ "$FALLBACK_INSTALL_OUTPUT" =~ "Arch-specific version not found, trying universal version" ]] && [[ "$FALLBACK_INSTALL_OUTPUT" =~ "Installed ${TEST_TOOL_NOARCH} successfully" ]]; then
+        print_test_result "Install universal tool with arch fallback" 0
+        
+        # Test update check for universal tool
+        UPDATE_UNIVERSAL_OUTPUT=$(timeout 3 "$GETPKG" install "${TEST_TOOL_NOARCH}" 2>&1) || UPDATE_UNIVERSAL_OUTPUT=""
+        if [[ "$UPDATE_UNIVERSAL_OUTPUT" =~ "${TEST_TOOL_NOARCH} is already up to date" ]]; then
+            print_test_result "Update check for universal tool" 0
+        else
+            print_test_result "Update check for universal tool" 1
+        fi
+    else
+        print_test_result "Install universal tool with arch fallback" 1
+        print_test_result "Update check for universal tool" 1
+    fi
 else
     echo -e "\n${YELLOW}Skipping publish/install tests (SOS_WRITE_TOKEN not set)${NC}"
     echo "To run full tests, set SOS_WRITE_TOKEN environment variable"
diff --git a/getpkg/test_debug/test-noarch-37801/test-noarch-37801 b/getpkg/test_debug/test-noarch-37801/test-noarch-37801
new file mode 100644
index 0000000..1db46ed
--- /dev/null
+++ b/getpkg/test_debug/test-noarch-37801/test-noarch-37801
@@ -0,0 +1,10 @@
+#\!/bin/bash
+case "$1" in
+    version)
+        echo "1.0.0"
+        ;;
+    *)
+        echo "Cross-platform test tool"
+        ;;
+esac
+EOF < /dev/null
diff --git a/getpkg/test_debug/test-noarch-37879/test-noarch-37879 b/getpkg/test_debug/test-noarch-37879/test-noarch-37879
new file mode 100755
index 0000000..405c71d
--- /dev/null
+++ b/getpkg/test_debug/test-noarch-37879/test-noarch-37879
@@ -0,0 +1,9 @@
+#\!/bin/bash
+case "$1" in
+    version)
+        echo "1.0.0"
+        ;;
+    *)
+        echo "Cross-platform test tool"
+        ;;
+esac
diff --git a/getpkg/test_debug/test-universal-12345/test-universal-12345 b/getpkg/test_debug/test-universal-12345/test-universal-12345
new file mode 100755
index 0000000..d535899
--- /dev/null
+++ b/getpkg/test_debug/test-universal-12345/test-universal-12345
@@ -0,0 +1,9 @@
+#\!/bin/bash
+case "$1" in
+    version)
+        echo "1.0.0"
+        ;;
+    *)
+        echo "Universal test tool"
+        ;;
+esac
diff --git a/getpkg/test_debug/test-universal-40978/test-universal-40978 b/getpkg/test_debug/test-universal-40978/test-universal-40978
new file mode 100755
index 0000000..0e2f8f8
--- /dev/null
+++ b/getpkg/test_debug/test-universal-40978/test-universal-40978
@@ -0,0 +1,2 @@
+#\!/bin/bash
+echo "Universal test tool v1.0.0"