The Strength Training Tracker Built for Lifters Who Want to Get Stronger
You don't need another app that counts calories or tracks your steps. You need one that knows the difference between a grind set at 90% and a PR you didn't see coming.
Gainr is a strength training tracker built specifically for people who lift. It logs your sets in seconds, detects personal records as they happen, and shows you exactly how every exercise is progressing over weeks and months. Free on iOS, Android, and web.
What Makes a Good Strength Training Tracker
Cardio apps track distance and heart rate. Strength training is a different problem. The data points that matter are weight, reps, sets, and volume — and how those numbers change over time for each individual exercise.
A strength training tracker should:
- Log sets fast so you're not fumbling with your phone during rest periods
- Remember what you lifted last time so you know what to beat today
- Detect PRs automatically instead of making you scroll through old sessions
- Show per-exercise trends so you can spot plateaus and breakthroughs
- Understand training balance so your program doesn't develop blind spots
Gainr does all of this. Here's how.
Log Sets in Seconds
When you're between sets with 90 seconds on the clock, the last thing you want is a slow interface.
Gainr's session screen shows your full workout plan: every exercise, target sets, and target reps. Tap an exercise, enter weight and reps, and the set is recorded with a timestamp. Your previous session's numbers are shown for reference so you know immediately whether to match, beat, or back off.
No menus. No scrolling through exercise databases mid-workout. Just weight, reps, logged.
4 Types of Personal Records, Detected in Real Time
Most trackers only recognize one kind of PR: the heaviest weight you've ever lifted. That misses most of your progress.
For exercises logged with weight and reps, Gainr tracks four PR categories. Reps-only and timed exercises have records suited to their logging mode.
Heaviest Set
Your best single-set volume: weight multiplied by reps. This captures the quality of a set, not just the load. Hitting 205 lbs for 8 reps (1,640 total) is a different kind of strong than 225 for 3 (675 total), and both deserve recognition.
Heaviest Weight
The traditional max. The heaviest weight you've moved for any number of reps on a given exercise. When you finally slap that extra plate on the bar, this is the PR that fires.
Most Reps
The highest rep count you've hit in a single set, regardless of weight. This tracks muscular endurance progress that pure weight PRs miss entirely. Going from 12 to 15 reps at 155 lbs on bench is real progress, even though the weight didn't change.
Session Volume
The total weight moved across all sets of an exercise in one session. If you did 4 sets of squats at 225 lbs for 8, 7, 6, and 6 reps, your session volume is 6,075 lbs. This captures overall work capacity and is often the first PR type to improve even when your max weight hasn't moved yet.
Every PR is detected the moment you log the set. You see a notification with the new value and your previous best. No waiting until the session ends. No checking manually.
Over months of training, these four categories create a detailed picture of how you're getting stronger, not just heavier.
See Exactly How Your Lifts Are Progressing
Numbers without context are just numbers. Gainr turns your training log into progression charts for every exercise.
Tap any exercise in your history and see a visual timeline of your performance: weight and reps plotted across every session. You can see at a glance whether your deadlift has been climbing, whether your overhead press has stalled, or whether your row volume is improving even though the weight hasn't increased.
30 and 90-Day Training Analytics
Beyond individual exercises, Gainr analyzes your overall training patterns:
- Muscle group distribution — How your sessions break down across chest, back, shoulders, legs, arms, and core
- Volume by muscle group — Total work per body part, not just session count
- Neglected muscles — Automatic flags when a muscle group hasn't been trained in 14+ days
- Training balance score — A single metric showing how evenly your programming covers your body
This is the kind of feedback most lifters only get from a coach reviewing their training log. In Gainr, it updates automatically after every session.
Your Active Session, Always One Tap Away
Mid-workout, you might check an exercise's history, review your previous PR, or look at a form note. Most apps make getting back to your active session a multi-tap journey through menus.
Gainr's floating session pill sits above your tab bar for the entire duration of your workout. It shows your current exercise progress and elapsed time with a pulsing indicator. Tap it from anywhere in the app and you're immediately back in your session.
It's a small design decision inspired by Apple Music's mini-player, and it removes the friction that makes people stop tracking mid-workout.
AI That Builds Your Workouts For You
Don't have a program? Don't want to spend an hour writing one?
Gainr's AI generates workouts and full multi-week training programs based on your actual profile:
- Fitness level — Beginner, intermediate, or advanced
- Lifting experience — From first-timer to 2+ years
- Available equipment — The AI only programs exercises you can actually do with what you have
- Training goal — Strength, muscle gain, weight loss, endurance, or general fitness
- Recent sessions — Avoids repeating exercises and muscle groups from your last 10 workouts
Single Workouts
Choose a workout type (push, pull, legs, upper, lower, full body), a duration (20 to 75 minutes), and an optional focus area. The AI generates a complete workout with exercises, sets, reps, and form notes.
Full Programs
Choose a training split (push/pull/legs, upper/lower, full body, bro split), workouts per week, and program length (4 to 12+ weeks). The AI builds every week with progressive overload, phase-based focus, and proper exercise rotation.
No other free strength training tracker generates periodized multi-week programs.
Built-in exercise library
Gainr includes a built-in exercise library organized by muscle group, equipment type, and exercise category:
Muscle Groups: Chest, Back, Shoulders, Biceps, Triceps, Forearms, Core, Quadriceps, Hamstrings, Glutes, Calves, Full Body
Equipment: Barbell, Dumbbell, Kettlebell, Cable Machine, Smith Machine, Bodyweight, Resistance Bands, Medicine Ball, and more
Types: Strength, Cardio, HIIT, Flexibility, Plyometric
Every exercise includes form notes. Need something that isn't in the library? Create custom exercises with your own descriptions, equipment tags, and muscle group assignments.
What You Get Free vs Pro
Gainr's free tier includes unlimited workout logging and progress tracking. Coach access is included for a 14-day preview, then continues with Pro.
Free tracking and Coach preview
- Full built-in exercise library
- Unlimited session tracking and set logging
- Personal records suited to each exercise's logging mode
- Per-exercise progression charts
- 30/90-day training analytics and balance insights
- Full workout history with session details
- Cross-platform sync (iOS, Android, web)
- 14-day Coach preview
- 2 saved custom workouts/programs combined
- 2 AI workout/program generation credits
Gainr Pro
- Everything in Free
- Ongoing weekly Coach plans, plan adjustments, and coach chat
- Unlimited custom workouts and programs
- Unlimited AI workout and program generation
Workout logging, personal records, and progress charts stay free. Pro continues Coach access after the preview and removes workout and program creation limits.
Works Where You Train
Gainr has native iOS and Android apps, plus a web version. Your data syncs in real time across every platform through a cloud backend.
Log sets on your phone at the gym. Review your progression charts on your laptop at home. Check PRs on the web during lunch. Everything stays in sync.
Built for People Who Take Lifting Seriously
There are plenty of general fitness apps that track workouts alongside sleep scores, water intake, and meditation minutes. Gainr doesn't do any of that.
It does one thing: help you track your strength training and see your progress clearly.
If you want an app that tells you to drink more water, look elsewhere. If you want an app that tells you your bench press volume is up 12% this month and you haven't trained hamstrings in 16 days, download Gainr.
Download Gainr Free on iOS, Android, and Web
Features described reflect the current version of Gainr. Available on iOS, Android, and web browsers.