Comparison

Relentless Trainer vs Thundr App

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

Thundr App

Access your training and nutrition plans, join group challenges, and schedule appointments with coaches. This app supports physical training and mental toughness for a winning mindset.

Highlights
  • Workout tracking
  • Nutrition information access
  • Group challenges
  • Scheduled workout viewing
  • Coach appointment booking
Features
Read full description

Crush your Thundrbro & Alpha Babe workouts from anywhere with the Thundr App! Gain access to all your training and nutrition information, join group challenges, see upcoming scheduled workouts, and book appointments with our knowledgeable Coaches. Founded by Dave Lipson & Camille Leblanc-Bazinet, our Mission is to make the world a better place through physical training, mental toughness with a winning mindset, while also elevating those around you. If you enjoy your training through the Thundr App, we’d love it if you took a second to leave a positive review because it helps us improve and also helps us reach more athletes. Thank you!!

Screenshots

Relentless Trainer4 screens
Thundr App4 screens

Verdict

The call

The clearest difference is rating: Relentless Trainer at 4.9 against Thundr App's 3.8. Relentless Trainer also leads on update cadence (every 3 days vs every 27 months). Thundr App's advantage is in-app purchases (none vs 9). On price, review sentiment, ratings volume 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. Relentless Trainer sells 9 in-app purchases, starting at $9.99 per month. Thundr App asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Relentless Trainer holds the better App Store score, 4.9 against 3.8. Both are backed by a comparable volume of ratings — 15 and 12 respectively. Written reviews complicate that: 60% of Relentless Trainer's written reviews are positive against 64% of Thundr App's, so the app with the better star average is not the one people write more warmly about.

UpkeepUpdate frequency

Relentless Trainer ships an update every 3 days, Thundr App every 27 months. The most recent releases landed on October 11, 2026 and October 2, 2026 respectively.

Scorecard4 real differences · 6 level
Relentless Trainer versus Thundr App: the parameters behind the verdict, then further details
ParameterRelentless TrainerThundr App
PriceFreeFree
Rating4.9 (15 ratings) — better3.8 (12 ratings)
Positive reviews60.0% of reviews63.6% of reviews — better
Number of ratings15 — better12
Update frequencyEvery 3 days — betterEvery 27 months
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchasesFree — better
DevicesiPhone, Apple WatchiPhone, iPod
Requires iOS16.615.0 — better
Further details — not scored
Size223 MB46 MB
Age rating4+12+
DeveloperRelentless Method ABDSS Sports Group Inc

Customer experience

Relentless Trainer

All ratings15 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews10 reviews
Positive60.0%
Neutral10.0%
Negative30.0%

Thundr App

All ratings12 ratings
Positive66.7%
Neutral0.0%
Negative33.3%
Written reviews11 reviews
Positive63.6%
Neutral0.0%
Negative36.4%

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
None

Thundr App

No in-app purchases

Questions

Is Relentless Trainer free?
Relentless Trainer is free to download, with in-app purchases available.
Is Thundr App free?
Thundr App is free to download, with no in-app purchases.
Which has better reviews, Relentless Trainer or Thundr App?
Relentless Trainer is rated higher. Relentless Trainer averages 4.9 out of 5 from 15 ratings, while Thundr App averages 3.8 from 12 ratings.
Do Relentless Trainer or Thundr App have ads?
Neither Relentless Trainer nor Thundr App shows ads.
Which is updated more often, Relentless Trainer or Thundr App?
Relentless Trainer ships an update every 3 days, and Thundr App every 27 months. Most recently, Relentless Trainer was updated on October 11, 2026 and Thundr App on October 2, 2026.

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