Comparison

RepZero vs Trunk

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

Trunk

This app helps you track your gym workouts and progress with an intuitive interface. It offers AI integration for personalized training plans and detailed analytics, all without any subscriptions.

Highlights
  • Workout logging
  • AI training plan integration
  • Progress visualization
  • Rest timer with notifications
  • Offline functionality
  • Customizable workout organization
  • Unlimited profiles and sessions
Features
Read full description

Trunk helps you log your lifting and review your progress. TRACK YOUR LIFTS Record sets, reps and weight. Organize your training with profiles, sessions and exercises. SEE YOUR PROGRESS Review your workout history, compare exercise performance over time, and track progress toward your goals. KEEP YOUR WORKOUT MOVING Set custom rest timers and use Trunk's Lock Screen workout controls. CONNECT YOUR OWN AI Already use an AI assistant like ChatGPT or Claude? Link it with Trunk and import the programs it builds for you in two taps. Anything you share with your AI is between you and your AI provider. AI integration requires Trunk+ (in-app purchase). Questions or feedback? Use the support link on this product page.

Screenshots

RepZero4 screens
Trunk4 screens

Verdict

The call

The clearest difference is ratings volume: RepZero at 3 against Trunk's 1. On price, rating, update cadence and ads 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 Trunk sells 1 one-off in-app purchase. 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 Trunk. Both are backed by a comparable volume of ratings — 3 and 1 respectively.

UpkeepUpdate frequency

RepZero ships an update every 10 days, Trunk every 2 weeks. Both last shipped on November 5, 2026.

Scorecard1 real difference · 9 level
RepZero versus Trunk: the parameters behind the verdict, then further details
ParameterRepZeroTrunk
PriceFreeFree
Rating5.0 (3 ratings)5.0 (1 ratings)
Positive reviews100.0% of reviews—
Number of ratings3 — better1
Update frequencyEvery 10 days — betterEvery 2 weeks
AdsNoNo
In-app purchasesYesYes
MonetizationFreemiumFree with in-app purchases
DevicesiPhone, iPad, Apple Watch — betteriPhone, iPad
Requires iOS26.0 — better26.2
Further details — not scored
Size154 MB6 MB
Age rating4+4+
DeveloperDark Matter AI Labs LLCAdventureland, Inc

Customer experience

RepZero

All ratings3 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

Trunk

All ratings1 ratings
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
1 purchases

Trunk

One-time1
  • Trunk+$9.99

Questions

Is RepZero free?
RepZero is free to download, with in-app purchases available.
Is Trunk free?
Trunk is free to download, with in-app purchases available.
Which has better reviews, RepZero or Trunk?
RepZero and Trunk are both rated 5.0 out of 5 on the App Store, from 3 and 1 ratings respectively.
Do RepZero or Trunk have ads?
Neither RepZero nor Trunk shows ads.
Which is updated more often, RepZero or Trunk?
RepZero ships an update every 10 days, and Trunk every 2 weeks. Most recently, RepZero was updated on November 5, 2026 and Trunk on November 5, 2026.

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