# Grey Matter Training vs CORE4 Members

Grey Matter Training and CORE4 Members 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.

Both are free to download. Grey Matter Training sells 1 in-app purchase, starting at $399.99 per month and CORE4 Members sells 1 in-app purchase, starting at $299.99 per month. Whichever you choose, the download price is not the number that matters.

Both ship on a similar rhythm, roughly monthly. The most recent releases landed on October 15, 2026 and October 17, 2026 respectively.

## The numbers

| Metric | Grey Matter Training | CORE4 Members |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (3 ratings)](https://appshunter.io/ios/app/grey-matter-training/id6444868629/reviews)** | — |
| Number of ratings | **3** | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Monthly | Monthly |
| Monetization | Free with in-app purchases | — |
| Size | 47 MB | 57 MB |
| Requires iOS | 15.0 | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 17+ | 4+ |
| Developer | [Michael White](https://appshunter.io/developer/1657473344) | [Coach Caelum](https://appshunter.io/developer/1878628764) |

## What reviewers say

### Grey Matter Training

[App page](https://appshunter.io/ios/app/grey-matter-training/id6444868629)

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:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Coaching | $399.99 | per month |


### CORE4 Members

[App page](https://appshunter.io/ios/app/core4-members/id6759445029)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| The CORE4 Framework | $299.99 | per month |


## Frequently asked questions

### Is Grey Matter Training free?

Grey Matter Training is free to download, with in-app purchases available.

### Is CORE4 Members free?

CORE4 Members is free to download, with in-app purchases available.

### Do Grey Matter Training or CORE4 Members have ads?

Neither Grey Matter Training nor CORE4 Members shows ads.

### Which is updated more often, Grey Matter Training or CORE4 Members?

Grey Matter Training ships an update monthly, and CORE4 Members monthly. Most recently, Grey Matter Training was updated on October 15, 2026 and CORE4 Members on October 17, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*