# Rad IQ vs HelloJapan

The clearest difference is in-app purchases: HelloJapan at none against Rad IQ's 3. HelloJapan also leads on update cadence (every 5 days vs every 132 months). Rad IQ's advantage is device support (3 vs 1) and iOS requirement (16.2 vs 27.0). On price and ads there is nothing between them.

Both are free to download. Rad IQ sells 3 one-off in-app purchases. HelloJapan asks for nothing beyond the download.

Rad IQ ships an update every 132 months, HelloJapan every 5 days. The most recent releases landed on October 14, 2026 and September 29, 2026 respectively.

## The numbers

| Metric | Rad IQ | HelloJapan |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 132 months | **Every 5 days** |
| Size | 15 MB | 10 MB |
| Requires iOS | **16.2** | 27.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Horatiu Rosca](https://appshunter.io/developer/591298745) | [Office Proteus](https://appshunter.io/developer/376643421) |

## What reviewers say

### Rad IQ

[App page](https://appshunter.io/ios/app/rad-iq/id991608591)

**Features:** macOS Compatibility

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Extra Time | $0.99 | one-time |
| Unlock Categories | $0.99 | one-time |
| Unlimited Questions | $1.99 | one-time |


### HelloJapan

[App page](https://appshunter.io/ios/app/hellojapan/id6463421461)

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

**In-app purchases:** none


## Frequently asked questions

### Is Rad IQ free?

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

### Is HelloJapan free?

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

### Do Rad IQ or HelloJapan have ads?

Neither Rad IQ nor HelloJapan shows ads.

### Which is updated more often, Rad IQ or HelloJapan?

Rad IQ ships an update every 132 months, and HelloJapan every 5 days. Most recently, Rad IQ was updated on October 14, 2026 and HelloJapan on September 29, 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.*