# Neptune Odyssey vs MCP Notes

The clearest difference is in-app purchases: MCP Notes at none against Neptune Odyssey's 6. MCP Notes also leads on update cadence (every 4 days vs every 2 months). Neptune Odyssey's advantage is iOS requirement (15.1 vs 26). On price, ads and device support there is nothing between them.

Both are free to download. Neptune Odyssey sells 6 in-app purchases, starting at $19.99 per month. MCP Notes asks for nothing beyond the download.

Neptune Odyssey ships an update every 2 months, MCP Notes every 4 days. The most recent releases landed on October 12, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | Neptune Odyssey | MCP Notes |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 4 days** |
| Size | 49 MB | 4 MB |
| Requires iOS | **15.1** | 26 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Mac |
| Age rating | 17+ | 4+ |
| Developer | [Neptune AI LLC](https://appshunter.io/developer/1871364974) | [Serhii Didanov](https://appshunter.io/developer/1894772280) |

## What reviewers say

### Neptune Odyssey

[App page](https://appshunter.io/ios/app/neptune-odyssey/id6758185758)

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

**In-app purchases (6)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Pro access | $19.99 | per month |
| Monthly Pro+ access | $49.99 | per month |
| Monthly Pro max access | $99.99 | per month |
| Annual Pro access | $191.99 | per year |
| Annual Pro+ access | $479.99 | per year |
| Annual Pro max access | $949.99 | per year |


### MCP Notes

[App page](https://appshunter.io/ios/app/mcp-notes/id6762989069)

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Neptune Odyssey free?

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

### Is MCP Notes free?

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

### Do Neptune Odyssey or MCP Notes have ads?

Neither Neptune Odyssey nor MCP Notes shows ads.

### Which is updated more often, Neptune Odyssey or MCP Notes?

Neptune Odyssey ships an update every 2 months, and MCP Notes every 4 days. Most recently, Neptune Odyssey was updated on October 12, 2026 and MCP Notes on October 25, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*