# Cortex Flex Performance vs Aspen ESA

Cortex Flex Performance and Aspen ESA 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. Cortex Flex Performance sells 1 in-app purchase, starting at $29.99 per month and Aspen ESA sells 2 in-app purchases, starting at $8.99 per month. Whichever you choose, the download price is not the number that matters.

Cortex Flex Performance ships an update every 2 weeks, Aspen ESA monthly. The most recent releases landed on October 10, 2026 and October 2, 2026 respectively.

## The numbers

| Metric | Cortex Flex Performance | Aspen ESA |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (10 ratings)](https://appshunter.io/ios/app/cortex-flex-performance/id6749107751/reviews)** | — |
| Number of ratings | **10** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 2 weeks** | Monthly |
| Monetization | Free with in-app purchases | — |
| Size | 52 MB | 37 MB |
| Requires iOS | **15.0** | 15.1 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 12+ | 4+ |
| Developer | [Cortex Flex Inc](https://appshunter.io/developer/1828821837) | [Aspen ESA LLC](https://appshunter.io/developer/6773147137) |

## What reviewers say

### Cortex Flex Performance

[App page](https://appshunter.io/ios/app/cortex-flex-performance/id6749107751)

This app offers brain training routines developed by neuroscientists to enhance focus, reaction time, and mental resilience for athletes. It includes specialized workouts, mental skills tools, and insights from recruiters to help users perform at their peak.

**Highlights:** Neuropriming Workouts, Mental Skills Training, Recruitment Insights, Game-Day Prep, Elite Athlete Community

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Cortex Monthly | $29.99 | per month |


### Aspen ESA

[App page](https://appshunter.io/ios/app/aspen-esa/id6773146565)

**Features:** Family Sharing

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Aspen ESA Plus | $8.99 | per month |
| Aspen ESA Plus — Annual | $59.99 | per year |


## Frequently asked questions

### Is Cortex Flex Performance free?

Cortex Flex Performance is free to download, with in-app purchases available.

### Is Aspen ESA free?

Aspen ESA is free to download, with in-app purchases available.

### Do Cortex Flex Performance or Aspen ESA have ads?

Neither Cortex Flex Performance nor Aspen ESA shows ads.

### Which is updated more often, Cortex Flex Performance or Aspen ESA?

Cortex Flex Performance ships an update every 2 weeks, and Aspen ESA monthly. Most recently, Cortex Flex Performance was updated on October 10, 2026 and Aspen ESA on October 2, 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.*