# NORTH Research Study vs RAD Study

The clearest difference is update cadence: RAD Study at every 3 weeks against NORTH Research Study's every 2 months. NORTH Research Study's advantage is iOS requirement (13.0 vs 16.0). 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.

NORTH Research Study ships an update every 2 months, RAD Study every 3 weeks. The most recent releases landed on September 5, 2026 and September 10, 2026 respectively.

## The numbers

| Metric | NORTH Research Study | RAD Study |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 3 weeks** |
| Size | 53 MB | 50 MB |
| Requires iOS | **13.0** | 16.0 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 17+ | 4+ |
| Developer | [Benjamin Buck](https://appshunter.io/developer/1649651898) | [Avicenna Research Inc.](https://appshunter.io/developer/1137173051) |

## What reviewers say

### NORTH Research Study

[App page](https://appshunter.io/ios/app/north-research-study/id6443820086)

**In-app purchases:** none


### RAD Study

[App page](https://appshunter.io/ios/app/rad-study/id6445949197)

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

**In-app purchases:** none


## Frequently asked questions

### Is NORTH Research Study free?

NORTH Research Study is free to download, with no in-app purchases.

### Is RAD Study free?

RAD Study is free to download, with no in-app purchases.

### Do NORTH Research Study or RAD Study have ads?

Neither NORTH Research Study nor RAD Study shows ads.

### Which is updated more often, NORTH Research Study or RAD Study?

NORTH Research Study ships an update every 2 months, and RAD Study every 3 weeks. Most recently, NORTH Research Study was updated on September 5, 2026 and RAD Study on September 10, 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.*