# AI~Diffuser vs Neptu Note

The clearest difference is in-app purchases: AI~Diffuser at none against Neptu Note's 10. AI~Diffuser also leads on iOS requirement (13.0 vs 15.0). Neptu Note's advantage is update cadence (every 3 days vs every 3 months). On price, ads and device support there is nothing between them.

Both are free to download. Neptu Note sells 10 in-app purchases, starting at $2.99 per month. AI~Diffuser asks for nothing beyond the download.

AI~Diffuser ships an update every 3 months, Neptu Note every 3 days. The most recent releases landed on September 19, 2026 and September 11, 2026 respectively.

## The numbers

| Metric | AI~Diffuser | Neptu Note |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 3 days** |
| Size | 58 MB | 81 MB |
| Requires iOS | **13.0** | 15.0 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 12+ |
| Developer | [Guangzhou Lanmei Computer Technology Co., Ltd.](https://appshunter.io/developer/989104097) | [海角先锋(北京)科技有限公司](https://appshunter.io/developer/576179475) |

## What reviewers say

### AI~Diffuser

[App page](https://appshunter.io/ios/app/aidiffuser/id6757913113)

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

**In-app purchases:** none


### Neptu Note

[App page](https://appshunter.io/ios/app/neptu-note/id6759074911)

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

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Starter Plan Monthly Fee | $2.99 | per month |
| Premium Plan Monthly Fee | $9.99 | per month |
| Starter Plan Annually Fee | $29.99 | per year |
| Business Plan Monthly Fee | $29.99 | per month |
| Premium Plan Annual Fee | $99.99 | per year |
| Business Plan Annual Fee | $299.99 | per year |
| 100 credits | $0.99 | one-time |
| 300 credits | $2.49 | one-time |
| 500 credits | $3.99 | one-time |
| 800 credits | $5.99 | one-time |


## Frequently asked questions

### Is AI~Diffuser free?

AI~Diffuser is free to download, with no in-app purchases.

### Is Neptu Note free?

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

### Do AI~Diffuser or Neptu Note have ads?

Neither AI~Diffuser nor Neptu Note shows ads.

### Which is updated more often, AI~Diffuser or Neptu Note?

AI~Diffuser ships an update every 3 months, and Neptu Note every 3 days. Most recently, AI~Diffuser was updated on September 19, 2026 and Neptu Note on September 11, 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.*