# NWHSU Rad Tech vs Cahokia 187

The clearest difference is update cadence: Cahokia 187 at every 3 months against NWHSU Rad Tech's every 16 months. NWHSU Rad Tech's advantage is device support (3 vs 1). On price, ads, in-app purchases and iOS requirement there is nothing between them.

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

NWHSU Rad Tech ships an update every 16 months, Cahokia 187 every 3 months. Both last shipped on November 3, 2026.

## The numbers

| Metric | NWHSU Rad Tech | Cahokia 187 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 16 months | **Every 3 months** |
| Size | 63 MB | 148 MB |
| Requires iOS | **15.0** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [NORTHWESTERN HEALTH SCIENCES UNIVERSITY](https://appshunter.io/developer/1537751411) | [Cahokia Unit School District 187](https://appshunter.io/developer/1688057574) |

## What reviewers say

### NWHSU Rad Tech

[App page](https://appshunter.io/ios/app/nwhsu-rad-tech/id1660631253)

**Features:** macOS Compatibility

**In-app purchases:** none


### Cahokia 187

[App page](https://appshunter.io/ios/app/cahokia-187/id6449201151)

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is NWHSU Rad Tech free?

NWHSU Rad Tech is free to download, with no in-app purchases.

### Is Cahokia 187 free?

Cahokia 187 is free to download, with no in-app purchases.

### Do NWHSU Rad Tech or Cahokia 187 have ads?

Neither NWHSU Rad Tech nor Cahokia 187 shows ads.

### Which is updated more often, NWHSU Rad Tech or Cahokia 187?

NWHSU Rad Tech ships an update every 16 months, and Cahokia 187 every 3 months. Most recently, NWHSU Rad Tech was updated on November 3, 2026 and Cahokia 187 on November 3, 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.*