Workout Tracker AI - AIFitLog

AIFitLog is a workout and body composition tracker built for lifters serious about muscle gain and fat loss.

Log sets, reps, RIR, weight, and body fat to track volume, strength, FFMI, and lean mass trends over time. AI turns your data into daily analysis, weekly scoring, and a day-by-day plan for next week. Plus TDEE and macro targets, 1RM calculator, warmup suggestions, plate calculator, and rest timer — everything you need at the gym, in one app.

Body Composition Tracking Log weight and body fat to automatically calculate lean mass, BMI, and FFMI. You can also connect AIFitLog with Apple Health to automatically import body weight and body fat percentage into your body composition logs. AIFitLog only reads body weight and body fat percentage from Apple Health and does not write data to Apple Health. You can disable the integration at any time in the app settings. See how your body is actually changing — not just the number on the scale. Set TDEE and macro targets to support your bulk, cut, or recomp.

Workout Logging Track every set: muscle group, exercise, weight, reps, and RIR. Add notes per set to capture what you felt in the moment. Monitor total volume and max weight trends to see which muscle groups and exercises are actually progressing.

AI Analysis (Premium) Your workout logs, body composition, and condition data — analyzed together.

・Daily Training Analysis Your current training status based on the last 30 days. See muscle-group progress and what to focus on next.

・Weekly Report Your week scored across training, body composition, and condition. What went well, what needs work, and where to improve.

・Next Week's Plan A day-by-day workout plan built from your logs, goals, and condition — designed for muscle gain, fat loss, or wherever you're headed.

Built-in Tools ・Warmup Calculator — suggested warmup sets based on exercise type and working weight ・Plate Calculator — select target weight and bar weight to see exactly which plates to load ・1RM Calculator — estimate your max from weight and reps, plus estimated reps at any target weight ・Rest Timer — keeps running even when you leave the screen ・Reminders — set custom days and times, with an option to notify only on days you haven't trained

Built for lifters who: ・Want to track workouts consistently and see real progress ・Are bulking or cutting with body composition data ・Train with data, not guesswork ・Want personalized AI analysis without a personal trainer price tag