Comparison

RepZero vs GymRx

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

RepZero

This app helps you track your weightlifting progress with detailed logging and an AI coach. It provides insights into your performance, personal records, and recovery, all while syncing seamlessly with Apple Watch and Health.

Highlights
  • Detailed set logging with rest timers
  • Plate calculator for barbells
  • Apple Watch integration for wrist tracking
  • AI coach for training advice
  • Progress visualization and personal records
  • Customizable workout programs
  • Muscle recovery insights
Features
Read full description

RepZero is a weight lifting log and gym workout tracker for iPhone and Apple Watch. Log every set in seconds, see your records the moment you break them, and always know what to train next. It's built for people who want to know they're getting stronger, not just hope they are. LOGGING THAT KEEPS UP WITH YOU RepZero shows one set at a time: tap your weight and reps, log it, and the rest timer starts on its own. Supersets, drop sets, timed holds and cardio all work the way you'd expect. • Plate calculator: which plates go on each side of a barbell, trap bar, EZ bar or Smith machine • Warm-ups in one tap, ramping up to your first working set • Rest timer on your Lock Screen and in the Dynamic Island, with skip and log buttons • New personal records show up live, mid-workout • Start a workout from a widget, Control Center, Siri or Shortcuts BUILT FOR APPLE WATCH Leave your phone in your bag. Start a workout on your wrist, turn the Digital Crown to set weight and reps, and double tap to log. Heart rate and calories go to Apple Health, and everything syncs back to your iPhone. PROGRAMS THAT MOVE YOU FORWARD Follow a program and RepZero plans every session and raises your weights as you progress. Beginner Strength and Dumbbell Foundations are free. Upper/Lower Hypertrophy, Push/Pull/Legs, Strength Waves and Minimalist come with Pro, and so does building your own program from your routines. AN AI COACH IN YOUR POCKET Ask the AI coach about your training, from what to train today to building a new routine. It runs on device with Apple Intelligence on supported iPhones. SEE YOUR PROGRESS, CLEARLY • Estimated 1RM, PRs and records for every lift • Volume, workout and training-time trends • A weekly goal with streaks that give you credit for rest days • Muscle recovery at a glance • A full history of every workout, as a list or a calendar • Achievements that reward consistency START STRONG, STAY ORGANIZED Use a ready-made routine or build your own in minutes, and share routines and programs with a link. Bring your history from other apps with an AI-assisted import. Back up to iCloud, sync across devices with a free account, and export your data anytime. REPZERO PRO Pro is for lifters who want a plan, not just a log. • Coach: ranked next steps after every workout, like adding sets to a lagging muscle or breaking through a plateau, applied to your routines in one tap • Recovery check: reads last night's sleep, heart rate variability and resting heart rate from Apple Health and suggests going lighter or taking a rest day. Those readings never leave your device. • All six programs, plus programs you build yourself • Lift forecasts, strength levels and muscle balance • Unlimited custom routines (free includes 5) • Body measurements, Lift and Progress widgets, and premium themes • The Gainz Goblin: a pixel-art pet on your Today screen, Watch and Live Activity. Train and he stays fed. Skip too many days and he gets hungry. WHOEVER YOU ARE Chasing your first bodyweight bench, running a powerlifting block or just trying to get to the gym three times a week, RepZero shows you it's working and what to do next. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://darkmatterlabs.app/privacy

About

GymRx

This app helps serious lifters train smarter by logging exercises, sets, reps, and weight. It offers an AI coach for real-time suggestions, a comprehensive exercise library with videos, and detailed progress tracking to help you hit new personal records.

Highlights
  • Log exercises, sets, reps, weight, and RIR
  • AI coach for real-time weight and rep suggestions
  • 264 exercise library with video demonstrations
  • Automatic personal record detection and analytics
  • Syncs with Apple HealthKit
  • Import from other popular workout apps
  • Offline-first functionality
Features
Read full description

GymRx is a powerful workout tracker and gym log built for serious lifters who want to train smarter, track progress, and hit new personal records. Whether you're powerlifting, bodybuilding, or training for strength, GymRx helps you focus on lifting — not typing. LOGGING & WORKOUT TRACKING - Log exercises, sets, reps, weight, and RIR (Reps in Reserve) - Auto-fill previous weight and reps - Automatic 50% and 75% warm-up sets - Cardio & duration-based exercises (running, cycling, planks) - Auto-start rest timer after every set - Live Activity rest timer on your lock screen and Dynamic Island APPLE WATCH - Log sets, reps, and weight directly from your wrist - Rest timer with haptic feedback - Live heart rate monitoring during workouts - Full sync with your iPhone — start on one, continue on the other PUSH COACH — YOUR AI SPOTTER - Real-time weight and rep suggestions on every set - Learns from your history and adjusts for fatigue - RIR-aware — respects your target intensity - Works during the workout, not after 264 EXERCISE LIBRARY WITH VIDEO DEMOS - Filter by muscle group, equipment, or movement pattern - Built-in video demonstrations - Create unlimited custom exercises WORKOUT PLANS & SCHEDULING - Build unlimited workout templates - Assign routines to specific days - Start today's workout in two taps PROGRESS, PRs & ANALYTICS - Automatic personal record detection - Strength percentiles - Workout streak and milestone celebrations - 8 customizable chart types - Calendar heatmap - Muscle frequency & movement balance tracking HEALTH & RECOVERY - Syncs with Apple HealthKit — body weight, HRV, resting heart rate, and sleep - Readiness Score — see if you're recovered enough to push hard today - Body weight trend chart with smoothing and time range filters - All health data stays on your device TOOLS - Plate calculator - Home screen widgets - Siri Shortcuts — "Start Push Day" hands-free - Shareable workout cards - 4 color themes plus full dark mode support IMPORT & EXPORT - Import from Strong, Hevy, JEFIT, and FitNotes - Export your full history (CSV or JSON) - Offline-first — full functionality without internet PREMIUM - Full history access - Training blocks - Advanced analytics - 14-day free trial GymRx offers optional auto-renewing subscriptions for premium features. Payment will be charged to your Apple ID account at confirmation of purchase. Subscriptions automatically renew unless canceled at least 24 hours before the end of the current period. You can manage or cancel subscriptions anytime in Settings > Apple ID > Subscriptions. Terms of Use: https://app.cascademobile.dev/legal/gymrx/terms Privacy Policy: https://app.cascademobile.dev/legal/gymrx/privacy

Screenshots

RepZero4 screens
GymRx4 screens

Verdict

The call

The clearest difference is iOS requirement: GymRx at 15.1 against RepZero's 26.0. On price, rating, review sentiment and ratings volume there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. RepZero sells 2 in-app purchases, starting at $1.99 per month and GymRx sells 4 in-app purchases, starting at $3.99 per month. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 5.0 for RepZero against 5.0 for GymRx. Both are backed by a comparable volume of ratings — 3 and 5 respectively. Written reviews split almost evenly too, at 100% and 100% positive.

UpkeepUpdate frequency

RepZero ships an update every 10 days, GymRx every 3 weeks. The most recent releases landed on November 8, 2026 and November 5, 2026 respectively.

Scorecard1 real difference · 9 level
RepZero versus GymRx: the parameters behind the verdict, then further details
ParameterRepZeroGymRx
PriceFreeFree
Rating5.0 (3 ratings)5.0 (5 ratings)
Positive reviews100.0% of reviews100.0% of reviews
Number of ratings35 — better
Update frequencyEvery 10 days — betterEvery 3 weeks
AdsNoNo
In-app purchasesYesYes
MonetizationFreemiumFreemium
DevicesiPhone, iPad, Apple WatchiPhone, iPod, Apple Watch
Requires iOS26.015.1 — better
Further details — not scored
Size154 MB68 MB
Age rating4+4+
DeveloperDark Matter AI Labs LLCGarrett Coughlin

Customer experience

RepZero

All ratings3 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews2 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

GymRx

All ratings5 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews3 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

2 purchases

RepZero

Subscriptions2
  • RepZero Pro Monthly14 Days trial$1.991 Month
  • RepZero Pro Yearly14 Days trial$19.991 Year
4 purchases

GymRx

Subscriptions4
  • GymRx Premium$3.991 Month
  • Cascade Fitness Bundle$6.991 Month
  • GymRx Premium$39.991 Year
Show 1 more
  • Cascade Fitness Bundle$49.991 Year

Questions

Is RepZero free?
RepZero is free to download, with in-app purchases available.
Is GymRx free?
GymRx is free to download, with in-app purchases available.
Which has better reviews, RepZero or GymRx?
RepZero and GymRx are both rated 5.0 out of 5 on the App Store, from 3 and 5 ratings respectively.
Do RepZero or GymRx have ads?
Neither RepZero nor GymRx shows ads.
Which is updated more often, RepZero or GymRx?
RepZero ships an update every 10 days, and GymRx every 3 weeks. Most recently, RepZero was updated on November 8, 2026 and GymRx on November 5, 2026.

Other comparisons