The "jar" file is the engine that runs these features. For version 1.20.1, it provides:
| Feature | JAR 1201 (Legacy) | Modern Lunar Client (2024/25) | | :--- | :--- | :--- | | | 1.7.10 – 1.12.2 only | 1.7.10 up to latest snapshot | | RAM Usage | ~800 MB – 1.2 GB | ~1.5 GB – 3 GB | | Modularity | High (easy to deobfuscate) | Low (heavily obfuscated with Stringer) | | Essential Features | Basic FPS boost, Keystrokes, Zoom | Replay system, Friend sync, Level head, Screenshot uploader | | Security | Vulnerable to known injection attacks | Advanced Acorp 5.0 anti-cheat | lunar client jar 1201