BookOfGains: Gym Workout Log

Your training. Your data. Your personal workout journal.

Book Of Gains is designed for lifters who want a fast, clean, and completely private way to track progress. No subscriptions, no cloud lock-in, and no account required. Just open the app and start logging your training.

EFFORTLESS TRACKING
Log your sets, reps, and weights in seconds. The streamlined interface keeps friction to a minimum so you can stay focused on your lifting instead of staring at your screen.

FAST ROUTINE & SPLIT BUILDER
Create custom splits, workout routines, and exercises with minimal effort. Whether you follow Push/Pull/Legs, Upper/Lower, or a fully custom program, setting up takes less than a minute.

BUILT-IN REST TIMER
Keep your workout rhythm on point. The integrated rest timer ensures consistent rest intervals between sets without needing a separate app.

OVERVIEW OF TRAINING HISTORY
Review your past workouts with a clean, detailed history log. Easily track your volume, view previous performance, and analyze your long-term consistency over time.

ESTIMATE YOUR ONE-REP MAX (1RM)
Track your true strength progression using the proven Epley formula, automatically calculated for your heavy lifts.

FULL DATA OWNERSHIP (IMPORT & EXPORT)
Your data belongs to you—period.
• Training Data: Seamlessly export or import your full workout history as CSV files anytime.
• Routines & Splits: Easily import and export your workout routines and split structures for backups or sharing.

100% PRIVATE & SUBSCRIPTION-FREE
• No account or registration required
• No cloud dependency or forced sync
• No monthly fees or subscriptions

Take full control of your fitness journey—simple, private, and powerful.