# N4 TEST vs Kiku Mentor

The clearest difference is in-app purchases: Kiku Mentor at none against N4 TEST's 5. Kiku Mentor also leads on ads (none vs shown) and update cadence (daily vs every 4 days). On price, device support and iOS requirement there is nothing between them.

Both are free to download. N4 TEST sells 5 in-app purchases, starting at $2.99 per month. Kiku Mentor asks for nothing beyond the download.

N4 TEST ships an update every 4 days, Kiku Mentor daily. The most recent releases landed on October 30, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | N4 TEST | Kiku Mentor |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 4 days | **Daily** |
| Size | 71 MB | 61 MB |
| Requires iOS | 18.0 | **17.0** |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [jaemin park](https://appshunter.io/developer/1663603862) | [Archmob Pte Ltd](https://appshunter.io/developer/1242870015) |

## What reviewers say

### N4 TEST

[App page](https://appshunter.io/ios/app/n4-test/id6742312112)

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

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 1-Month Subscription | $2.99 | per month |
| 1-Year Subscription | $19.99 | per year |
| Reading Set 2 | $0.99 | one-time |
| Listening Set 2 | $1.99 | one-time |
| 광고 제거 | $1.99 | one-time |


### Kiku Mentor

[App page](https://appshunter.io/ios/app/kiku-mentor/id6761232956)

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

**In-app purchases:** none


## Frequently asked questions

### Is N4 TEST free?

N4 TEST is free to download, with in-app purchases available.

### Is Kiku Mentor free?

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

### Do N4 TEST or Kiku Mentor have ads?

N4 TEST shows ads; Kiku Mentor does not.

### Which is updated more often, N4 TEST or Kiku Mentor?

N4 TEST ships an update every 4 days, and Kiku Mentor daily. Most recently, N4 TEST was updated on October 30, 2026 and Kiku Mentor on October 24, 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.*