About This Site
+1 Muscle to Arm Wrestle Guide & Tools is an unofficial fan-made companion site created to help players get the most out of the Roblox game developed by Beast Lifters. We are not affiliated with, endorsed by, or connected to Roblox Corporation or Beast Lifters.
What We Offer
- Active Codes -Verified promo codes updated regularly, with rewards and expiration tracking.
- Muscle Calculator -Plan your muscle gains based on dumbbell tier, pet bonus, and rebirth level.
- Wins Calculator -Find the best opponents to farm and calculate how many matches you need.
- Rebirth Calculator -Determine the optimal time to rebirth with break-even analysis.
- Dumbbell Calculator -Compare dumbbell upgrades and find the most cost-efficient path.
- Egg Calculator -Calculate hatch probabilities and expected costs for each egg type.
- Pet Calculator -Compare pet multipliers and see how they affect your muscle and wins.
- Pet Tier List -All pets ranked from S to D tier with detailed stats.
- Wiki & Guides -Complete walkthrough for all worlds, opponents, eggs, and dumbbells.
Data Sources
Our data comes from in-game observations, the official Roblox game page, developer announcements, community reports, and verified YouTube content creators. We cross-reference multiple sources to ensure accuracy.
Update Frequency
We update codes, tier lists, and game data within 24 hours of new game updates. The game typically updates every saturday. Calculators and tools are reviewed monthly to ensure formulas match the current game mechanics.
How to Submit Corrections
If you find outdated information, incorrect stats, or expired codes still listed as active, please reach out through our Contact page. We review all submissions and update the site accordingly.
Disclaimer
This is an unofficial fan site. +1 Muscle to Arm Wrestle is a trademark of Beast Lifters. Roblox is a trademark of Roblox Corporation. This site is not endorsed by or affiliated with Roblox Corporation or Beast Lifters. All game content, images, and names are property of their respective owners. This site exists solely to provide helpful information to players.