About Gainzbook
Gainzbook is a workout, nutrition and strength tracking app. You log training and meals, and Gainzbook shows your progress over time and how your lifts compare with reference strength standards.
What can you do with Gainzbook?
- Log workouts: record exercises, sets, reps and weights, and follow your personal records. Browse the workouts and programmes that can be added to your account.
- Track nutrition: log food and review calories and macros against your targets.
- Measure progress: keep body measurements and see lift history in one place.
- See strength levels: compare a lift with reference standards from Beginner to Elite.
- Learn exercises: read the exercise guides with muscles worked and step-by-step instructions.
Free tools that need no account
The calculators work without signing in: one rep max, plate loading, deload planning and daily protein. Each page explains its formula, assumptions and limits.
How should I treat the numbers Gainzbook shows?
Calculators give estimates, and strength levels compare a lift with a reference dataset, not with every lifter. Both are general information, not personalised coaching, medical or nutrition advice. If you have a health condition or injury, speak to a qualified professional first.
How can I contact Gainzbook?
Email hello@gainzbook.com for questions, feedback or support. See also the Privacy Policy, Terms & Conditions and Cookie Policy.