: WeMod offers a robust free tier that includes most core cheating features. While there is a Pro version for mobile app control, you can access the trainers themselves for $0. Reliable Alternatives

Activision frequently runs Double XP and Double Weapon XP weekends. Combining these events with tokens earned from the Battle Pass allows you to level up weapons four times faster than normal. The Zombies "Outbreak" Strat for Easy Weapon XP

: Unauthorized software may request administrative privileges, potentially giving the application access to sensitive personal data stored on the computer. Terms of Service and Anti-Cheat Policies

If you are looking for a challenge boost without third-party software, you can utilize built-in, legal methods: