diff --git a/Windows/Rust/CubeLib/src/lib.rs b/Windows/Rust/CubeLib/src/lib.rs
index a10c581..44e6561 100644
--- a/Windows/Rust/CubeLib/src/lib.rs
+++ b/Windows/Rust/CubeLib/src/lib.rs
@@ -5,6 +5,7 @@
 //! ## Modules
 //!
 //! - [`websocket`] - WebSocket client and server implementations
+//! - [`version`] - Version string comparison utilities
 //!
 //! ## Quick Start
 //!
@@ -27,7 +28,19 @@
 //!     client.connect().await;
 //! }
 //! ```
+//!
+//! ## Version Comparison
+//!
+//! ```rust
+//! use cube_lib::version::{version_less_than, needs_update};
+//!
+//! // Check if update is needed
+//! assert!(version_less_than("1.0.0", "1.0.1"));
+//! assert!(needs_update("1.0.0", "1.0.1"));
+//! ```
 
 pub mod websocket;
+pub mod version;
 
 pub use websocket::{WebSocketClient, WebSocketConfig, WebSocketMessage, OutgoingMessage, ConnectionStatus, ReconnectedCallback, MessageSender};
+pub use version::{version_less_than, compare_versions, needs_update, parse_version};
diff --git a/Windows/Rust/CubeLib/src/version.rs b/Windows/Rust/CubeLib/src/version.rs
new file mode 100644
index 0000000..cf54fb7
--- /dev/null
+++ b/Windows/Rust/CubeLib/src/version.rs
@@ -0,0 +1,139 @@
+//! # Version utilities
+//!
+//! Provides version string comparison utilities for semver-like version strings.
+
+use std::cmp::Ordering;
+
+/// Parse a version string into a vector of unsigned integers.
+///
+/// "1.2.3" → [1, 2, 3]
+/// "1.2"   → [1, 2]
+/// "1.2.3.4.5" → [1, 2, 3, 4, 5]
+/// "" or invalid parts are skipped.
+pub fn parse_version(version: &str) -> Vec<u32> {
+    version
+        .split('.')
+        .filter(|s| !s.is_empty())
+        .filter_map(|s| s.parse().ok())
+        .collect()
+}
+
+/// Compare two version strings.
+///
+/// Returns `true` if `current < required` (i.e. current needs to be updated).
+///
+/// Comparison is done part-by-part (split by `.`).
+/// Missing parts are treated as `0`.
+/// Examples:
+/// - `"1.0.0"` < `"1.0.1"` → true
+/// - `"1.0.0"` < `"1.1.0"` → true
+/// - `"1.0.0"` < `"2.0.0"` → true
+/// - `"1.0.0"` < `"1.0.0"` → false (equal)
+/// - `"1.0.1"` < `"1.0.0"` → false
+///
+/// # Arguments
+/// * `current` - The current/local version string
+/// * `required` - The required/server version string
+pub fn version_less_than(current: &str, required: &str) -> bool {
+    compare_versions(current, required) == Ordering::Less
+}
+
+/// Compare two version strings, returning the standard `Ordering` result.
+///
+/// This is the canonical comparison function. Use [`version_less_than`] if you
+/// only need a boolean upgrade check.
+pub fn compare_versions(a: &str, b: &str) -> Ordering {
+    let a_parts = parse_version(a);
+    let b_parts = parse_version(b);
+
+    let max_len = a_parts.len().max(b_parts.len());
+
+    for i in 0..max_len {
+        let av = a_parts.get(i).copied().unwrap_or(0);
+        let bv = b_parts.get(i).copied().unwrap_or(0);
+
+        match av.cmp(&bv) {
+            Ordering::Less => return Ordering::Less,
+            Ordering::Greater => return Ordering::Greater,
+            Ordering::Equal => continue,
+        }
+    }
+
+    Ordering::Equal
+}
+
+/// Check if a local version is outdated compared to a server version.
+///
+/// Returns `true` if:
+/// - local is "0.0.0" / empty (file does not exist)
+/// - local version < server version
+pub fn needs_update(local_version: &str, server_version: &str) -> bool {
+    local_version == "0.0.0"
+        || local_version.is_empty()
+        || version_less_than(local_version, server_version)
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn test_parse_version() {
+        assert_eq!(parse_version("1.2.3"), vec![1, 2, 3]);
+        assert_eq!(parse_version("1.2"), vec![1, 2]);
+        assert_eq!(parse_version("1.2.3.4.5"), vec![1, 2, 3, 4, 5]);
+        assert_eq!(parse_version(""), Vec::<u32>::new());
+        assert_eq!(parse_version("1..3"), vec![1, 3]);
+        assert_eq!(parse_version("abc"), Vec::<u32>::new());
+    }
+
+    #[test]
+    fn test_version_less_than() {
+        // Basic comparisons
+        assert!(version_less_than("1.0.0", "1.0.1"));
+        assert!(version_less_than("1.0.0", "1.1.0"));
+        assert!(version_less_than("1.0.0", "2.0.0"));
+        assert!(version_less_than("0.0.1", "0.0.2"));
+
+        // Equal versions
+        assert!(!version_less_than("1.0.0", "1.0.0"));
+        assert!(!version_less_than("1.2.3", "1.2.3"));
+
+        // Newer local version
+        assert!(!version_less_than("1.0.1", "1.0.0"));
+        assert!(!version_less_than("2.0.0", "1.0.0"));
+
+        // Different part counts
+        assert!(version_less_than("1.0", "1.0.1"));
+        assert!(version_less_than("1", "1.0.1"));
+        assert!(version_less_than("1.0.0", "1.0.0.1"));
+        assert!(version_less_than("1", "2"));
+
+        // Treats missing parts as 0
+        assert!(version_less_than("1", "1.0.1"));
+        assert!(!version_less_than("1.0.0", "1"));
+    }
+
+    #[test]
+    fn test_compare_versions() {
+        use std::cmp::Ordering;
+        assert_eq!(compare_versions("1.0.0", "1.0.1"), Ordering::Less);
+        assert_eq!(compare_versions("1.0.1", "1.0.0"), Ordering::Greater);
+        assert_eq!(compare_versions("1.0.0", "1.0.0"), Ordering::Equal);
+    }
+
+    #[test]
+    fn test_needs_update() {
+        // Missing local
+        assert!(needs_update("0.0.0", "1.0.0"));
+        assert!(needs_update("", "1.0.0"));
+
+        // Needs update
+        assert!(needs_update("1.0.0", "1.0.1"));
+        assert!(needs_update("1.0.0", "2.0.0"));
+
+        // Already up to date
+        assert!(!needs_update("1.0.0", "1.0.0"));
+        assert!(!needs_update("1.0.1", "1.0.0"));
+    }
+}