Grey Matter Training vs Renu by Sam Thai
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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.
- Individualized training plans
- Evidence-based nutrition guidance
- Supplementation strategies
- For physique and strength athletes
- For training enthusiasts
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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
Renu by Sam Thai
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Renu is the private 1:1 coaching app for clients of Sam Thai. Sam has coached since 2016. He built Renu for people who have trained for years and still don’t have the physique to show for it. Nothing in the app is a template. Everything is built around you and your data. What’s inside Your training. Block-based programming, rewritten as we go based on your real performance and recovery. Travel-week sessions for when life moves. Your nutrition. Your targets and meal structure, built to survive work dinners, travel and weekends. Daily and weekly check-ins. Log your numbers, photos and how the week went. Sam reviews every check-in and replies the same day. Direct messaging. Ask Sam the in-the-moment questions, Monday to Friday. One place for all of it. No spreadsheets, no scattered messages, no guessing what’s next. Please note: Renu is for current clients of Sam Thai. Access comes with your coaching, and places are limited. To apply, visit apply.coachsamthai.com Renu provides coaching and general fitness guidance. It isn’t medical advice. * App access requires paid coaching plan Terms of use: https://kahunas.io/terms-conditions Privacy policy: https://kahunas.io/privacy
Screenshots
Verdict
The clearest difference is update cadence: Grey Matter Training at monthly against Renu by Sam Thai's every 4 months. 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
Both are free to download. Grey Matter Training sells 1 in-app purchase, starting at $399.99 per month and Renu by Sam Thai sells 1 in-app purchase, starting at $200.00 per month. Whichever you choose, the download price is not the number that matters.
Grey Matter Training ships an update monthly, Renu by Sam Thai every 4 months. The most recent releases landed on November 3, 2026 and October 30, 2026 respectively.
| Parameter | Grey Matter Training | Renu by Sam Thai |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (3 ratings) — better | — |
| Number of ratings | 3 — better | — |
| Update frequency | Monthly — better | Every 4 months |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | — |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 15.0 | 15.0 |
| Further details — not scored | ||
| Size | 47 MB | 56 MB |
| Age rating | 17+ | 17+ |
| Developer | Michael White | Sam Hughes |
In-app purchases
Grey Matter Training
- Monthly Coaching$399.991 Month
Renu by Sam Thai
- Coaching$200.001 Month
Questions
Is Grey Matter Training free?
Is Renu by Sam Thai free?
Do Grey Matter Training or Renu by Sam Thai have ads?
Which is updated more often, Grey Matter Training or Renu by Sam Thai?
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