# Brain vs Cudex

The clearest difference is price: Cudex at Free against Brain's $39.99. Brain's advantage is iOS requirement (17.0 vs 26.5). On update cadence, ads, in-app purchases and device support there is nothing between them.

Cudex is free to download; Brain costs $39.99 up front. Brain sells 3 in-app purchases, starting at $0.99 per month and Cudex sells 3 in-app purchases, starting at $4.99 per month. Whichever you choose, the download price is not the number that matters.

Both ship on a similar rhythm, roughly every 5 days. Both last shipped on October 1, 2026.

## The numbers

| Metric | Brain | Cudex |
| --- | --- | --- |
| Price | $39.99 | **Free** |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/brain-shift/id6787929828/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 5 days | Every 5 days |
| Monetization | Freemium | — |
| Size | 895 MB | 29 MB |
| Requires iOS | **17.0** | 26.5 |
| Devices | iPhone | **iPhone, Apple Watch** |
| Age rating | 4+ | 4+ |
| Developer | [ANTONINO COLOMBA](https://appshunter.io/developer/6787929830) | [Siraj Hasanov](https://appshunter.io/developer/1671322095) |

## What reviewers say

### Brain

[App page](https://appshunter.io/ios/app/brain-shift/id6787929828)

This app offers a private audio practice designed to cultivate positive self-talk and transform beneficial thoughts into consistent actions. It features guided conversations and affirmation loops to aid in sleep and daytime use, with options for personalization and local storage of all your data.

**Highlights:** Two-voice conversation practice, Overnight affirmation loops, Customizable voice packs, Record your own phrases, Private journal for goal tracking, Local data storage

**Features:** Family Sharing

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Sound-a-tude Plus | $0.99 | per month |
| Quit Smoking | $49.99 | one-time |
| Calm & Control | $49.99 | one-time |


### Cudex

[App page](https://appshunter.io/ios/app/cudex-step-tracker/id6798348522)

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro Month | $4.99 | per month |
| Pro Year | $29.99 | per year |
| Pro Lifetime | $59.99 | one-time |


## Frequently asked questions

### Is Brain free?

Brain costs $39.99, and also offers in-app purchases.

### Is Cudex free?

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

### Do Brain or Cudex have ads?

Neither Brain nor Cudex shows ads.

### Which is updated more often, Brain or Cudex?

Brain ships an update every 5 days, and Cudex every 5 days. Most recently, Brain was updated on October 1, 2026 and Cudex on October 1, 2026.

---

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