# Diffu vs JNC

The clearest difference is in-app purchases: JNC at none against Diffu's 6. JNC also leads on ads (none vs shown) and update cadence (every 3 days vs every 2 weeks). On price, device support and iOS requirement there is nothing between them.

Both are free to download. Diffu sells 6 in-app purchases, starting at $2.99 per month. JNC asks for nothing beyond the download.

Diffu ships an update every 2 weeks, JNC every 3 days. Both last shipped on October 31, 2026.

## The numbers

| Metric | Diffu | JNC |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 2 weeks | **Every 3 days** |
| Size | 73 MB | 273 MB |
| Requires iOS | 15.0 | 15.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 17+ | 4+ |
| Developer | [Jeong-Hwan Jang](https://appshunter.io/developer/1880755654) | [SUNG TAE EO](https://appshunter.io/developer/1883059666) |

## What reviewers say

### Diffu

[App page](https://appshunter.io/ios/app/diffu-something-to-say/id6759802088)

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

**In-app purchases (6)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Diffu Premium | $2.99 | per month |
| Diffu Premium | $29.99 | per year |
| 100 엠버 | $0.49 | one-time |
| 500 엠버 | $2.99 | one-time |
| 1000 엠버 | $6.99 | one-time |
| 3000 엠버 | $19.99 | one-time |


### JNC

[App page](https://appshunter.io/ios/app/jnc-smart-reward/id6760189291)

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Diffu free?

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

### Is JNC free?

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

### Do Diffu or JNC have ads?

Diffu shows ads; JNC does not.

### Which is updated more often, Diffu or JNC?

Diffu ships an update every 2 weeks, and JNC every 3 days. Most recently, Diffu was updated on October 31, 2026 and JNC on October 31, 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.*