Comparison

Relentless Trainer vs 42Runs

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

Head to head
About

Relentless Trainer

This AI-powered coach creates daily personalized workouts for various fitness disciplines, adapting to your current state and history. It offers nutrition plans, extensive exercise libraries with videos, and flexible training options. Track progress and integrate with health apps and smart devices for a comprehensive fitness experience.

Highlights
  • AI-powered personalized workouts
  • Nutrition program
  • 1200+ exercises with videos
  • Flexible training options
  • Integration with health apps
  • Specialized training tracks
Features
Read full description

Relentless Trainer: Your AI-Powered Personal Coach Born from the CrossFit® community and backed by over 10 years of data, we present Relentless Trainer - the first AI trainer for CrossFit®, Weightlifting, Gymnastics, Strength Training, Endurance sports, Mobility, Hyrox, Bodybuilding, Hybrid training, ATHX and Calisthenics. Race-optimized goal engine for Running, Skiing, Biking and Rowing. We even have Tactical Fitness, a specialized track for military and rescue staff. Forget generic training programs. Relentless Trainer adapts your workout daily based on: Your current state Your fitness level Your recent training history Your strengths and weaknesses Features: Nutrition program for weight loss or muscle mass Personalized workouts Over 1200 exercises with descriptions and videos Flexible training time and equipment Specialized training tracks Integration with health apps and smart devices Whether you want to improve your Snatch, Squat, Bench press, rowing, running, pull-ups, or muscle-ups, the trainer has you covered. Relentless Trainer is a month-to-month subscription service, easily cancellable anytime. No long-term contracts or cancellation fees - we just want you to love training! Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

About

42Runs

Features
Read full description

42Runs builds structured running training plans — from Couch to 5K through your first marathon. Unlike generic pace charts, every workout targets your own threshold pace and heart-rate zones, calculated from your personal data. • Structured plans for every distance and level, 5K to marathon • Personal pace and heart-rate zones on every workout • Link a plan's goal time directly to your race for a training pace that updates automatically • Every workout syncs straight to your watch via intervals.icu (Garmin and most major brands) Start training today Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

Relentless Trainer4 screens
42Runs4 screens

Verdict

The call

The clearest difference is update cadence: 42Runs at daily against Relentless Trainer's every 3 days. Relentless Trainer's advantage is iOS requirement (16.6 vs 18.0). On price, ads, in-app purchases and device support 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. Relentless Trainer sells 9 in-app purchases, starting at $9.99 per month and 42Runs sells 2 in-app purchases, starting at $3.99 per month. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

Relentless Trainer ships an update every 3 days, 42Runs daily. The most recent releases landed on October 11, 2026 and October 15, 2026 respectively.

Scorecard2 real differences · 8 level
Relentless Trainer versus 42Runs: the parameters behind the verdict, then further details
ParameterRelentless Trainer42Runs
PriceFreeFree
Rating4.9 (15 ratings) — better—
Positive reviews60.0% of reviews—
Number of ratings15 — better—
Update frequencyEvery 3 daysDaily — better
AdsNoNo
In-app purchasesYesYes
MonetizationFree with in-app purchases—
DevicesiPhone, Apple Watch — betteriPhone
Requires iOS16.6 — better18.0
Further details — not scored
Size223 MB23 MB
Age rating4+4+
DeveloperRelentless Method AB42Endurance

In-app purchases

9 purchases

Relentless Trainer

Subscriptions9
  • Dash Monthly Subscription14 Days trial$9.991 Month
  • Core Monthly Subscription14 Days trial$17.991 Month
  • Monthly14 Days trial$23.991 Month
Show 6 more
  • Dash Quarterly Subscription14 Days trial$23.993 Months
  • Core Quarterly Subscription14 Days trial$44.993 Months
  • Quarterly14 Days trial$59.993 Months
  • Dash Yearly Subscription14 Days trial$79.991 Year
  • Core Yearly Subscription14 Days trial$149.991 Year
  • Yearly14 Days trial$195.991 Year
2 purchases

42Runs

Subscriptions2
  • 42Runs Pro Founding Monthly$3.991 Month
  • 42Runs Pro Founding Yearly$39.991 Year

Questions

Is Relentless Trainer free?
Relentless Trainer is free to download, with in-app purchases available.
Is 42Runs free?
42Runs is free to download, with in-app purchases available.
Do Relentless Trainer or 42Runs have ads?
Neither Relentless Trainer nor 42Runs shows ads.
Which is updated more often, Relentless Trainer or 42Runs?
Relentless Trainer ships an update every 3 days, and 42Runs daily. Most recently, Relentless Trainer was updated on October 11, 2026 and 42Runs on October 15, 2026.

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