Comparison

Grey Matter Training vs MD3 Nutrition

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

Head to head
About

Grey Matter Training

This app offers personalized, science-backed training, nutrition, and supplement guidance for competitive athletes and fitness enthusiasts. It requires a paid coaching plan to access its full features.

Highlights
  • Individualized training plans
  • Evidence-based nutrition guidance
  • Supplementation strategies
  • For physique and strength athletes
  • For training enthusiasts
Features
Read full description

Grey Matter Training is a service providing individualized, evidence-based training, nutrition, and supplementation plans for competitive physique athletes, strength athletes, and training enthusiasts alike. *Requires paid coaching plan Terms of use: https://kahunas.io/terms-conditions Privacy policy: https://kahunas.io/privacy

About

MD3 Nutrition

Features
Read full description

Transform your physique by receiving personalized fitness and nutrition guidance from an experienced coach who understands what it takes to achieve real results. This app connects you directly with professional coaching services designed for serious athletes and fitness enthusiasts alike. Whether your goal is to lose fat, increase muscle, get stronger, or compete in bodybuilding - this app is for you. Please note that you must purchase a coaching plan prior to being able to access the app. *App access requires a paid coaching plan. Terms Of Use: https://kahunas.io/terms-conditions Privacy Policy: https://kahunas.io/privacy Medical Disclaimer: This app does not provide medical advice, diagnoses, or treatment. The information and guidance provided within the app are for general fitness and wellbeing purposes only. Always seek the advice of your physician or other qualified healthcare provider before starting any exercise program, changing your nutrition, or making decisions regarding your health.

Screenshots

Grey Matter Training3 screens
MD3 Nutrition3 screens

Verdict

The call

Grey Matter Training and MD3 Nutrition are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

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. Grey Matter Training sells 1 in-app purchase, starting at $399.99 per month and MD3 Nutrition sells 1 in-app purchase, starting at $259.99 per month. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

Grey Matter Training ships an update monthly, MD3 Nutrition every 2 months. The most recent releases landed on November 3, 2026 and November 5, 2026 respectively.

ScorecardNo meaningful differences
Grey Matter Training versus MD3 Nutrition: the parameters behind the verdict, then further details
ParameterGrey Matter TrainingMD3 Nutrition
PriceFreeFree
Rating5.0 (3 ratings) — better—
Number of ratings3 — better—
Update frequencyMonthly — betterEvery 2 months
AdsNoNo
In-app purchasesYesYes
MonetizationFree with in-app purchases—
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.015.0
Further details — not scored
Size47 MB55 MB
Age rating17+17+
DeveloperMichael WhiteMD3 Nutrition LLC

In-app purchases

1 purchases

Grey Matter Training

Subscriptions1
  • Monthly Coaching$399.991 Month
1 purchases

MD3 Nutrition

Subscriptions1
  • Monthly Coaching$259.991 Month

Questions

Is Grey Matter Training free?
Grey Matter Training is free to download, with in-app purchases available.
Is MD3 Nutrition free?
MD3 Nutrition is free to download, with in-app purchases available.
Do Grey Matter Training or MD3 Nutrition have ads?
Neither Grey Matter Training nor MD3 Nutrition shows ads.
Which is updated more often, Grey Matter Training or MD3 Nutrition?
Grey Matter Training ships an update monthly, and MD3 Nutrition every 2 months. Most recently, Grey Matter Training was updated on November 3, 2026 and MD3 Nutrition on November 5, 2026.

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