# Cortex Cloud vs Number System Trainer

The clearest difference is review sentiment: Number System Trainer at 100% against Cortex Cloud's 29%. Number System Trainer also leads on rating (5.0 vs 3.4) and update cadence (weekly vs every 6 weeks). Cortex Cloud's advantage is monetization model (free vs free with in-app purchases) and ratings volume (72 vs 10). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Number System Trainer holds the better App Store score, 5.0 against 3.4. That said, the two scores are not equally well evidenced: Cortex Cloud has 72 ratings behind it against 10, so its average is the more settled of the two. Written reviews point the same way: 29% of Cortex Cloud's written reviews are positive against 100% of Number System Trainer's.

Cortex Cloud ships an update every 6 weeks, Number System Trainer weekly. The most recent releases landed on October 16, 2026 and October 2, 2026 respectively.

## The numbers

| Metric | Cortex Cloud | Number System Trainer |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.4 (72 ratings)](https://appshunter.io/ios/app/cortex-cloud/id1484938666/reviews) | **[5.0 (10 ratings)](https://appshunter.io/ios/app/number-system-trainer/id6786437503/reviews)** |
| Number of ratings | **72** | 10 |
| Positive reviews | 28.9% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 6 weeks | **Weekly** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 100 MB | 10 MB |
| Requires iOS | **13.0** | 15.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Neural DSP](https://appshunter.io/developer/1458496080) | [Brandon Oaks](https://appshunter.io/developer/6786437505) |

## What reviewers say

### Cortex Cloud

[App page](https://appshunter.io/ios/app/cortex-cloud/id1484938666)

Manage your Nano Cortex and access cloud-based content with an elegant interface. Browse and download presets, neural captures, and more. Control your device's profile and privacy settings.

**Highlights:** Control Nano Cortex, Access Cortex Cloud, Browse users and presets, Download content, Manage profile and privacy, Share content

**Features:** Vision Pro support

**In-app purchases:** none


### Number System Trainer

[App page](https://appshunter.io/ios/app/number-system-trainer/id6786437503)

Learn and master the Nashville Number System for music. This app offers interactive modules to help musicians of all levels understand chord progressions, transpose songs, and improve their ear training. It's designed for quick learning and on-the-fly musical communication.

**Highlights:** Interactive learning modules, Chord reading and identification, Instant transposition, Ear training exercises, Visual chord shapes, Circle of 4ths & 5ths reference

**Features:** macOS Compatibility, Family Sharing

**In-app purchases:** none


## Frequently asked questions

### Is Cortex Cloud free?

Cortex Cloud is free to download, with no in-app purchases.

### Is Number System Trainer free?

Number System Trainer is free to download, with no in-app purchases.

### Which has better reviews, Cortex Cloud or Number System Trainer?

Number System Trainer is rated higher. Cortex Cloud averages 3.4 out of 5 from 72 ratings, while Number System Trainer averages 5.0 from 10 ratings.

### Do Cortex Cloud or Number System Trainer have ads?

Neither Cortex Cloud nor Number System Trainer shows ads.

### Which is updated more often, Cortex Cloud or Number System Trainer?

Cortex Cloud ships an update every 6 weeks, and Number System Trainer weekly. Most recently, Cortex Cloud was updated on October 16, 2026 and Number System Trainer 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.*