# Neptune Odyssey vs Better Keep

The clearest difference is update cadence: Better Keep at every 4 days against Neptune Odyssey's every 2 months. On price, ads, in-app purchases 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 and Better Keep sells 2 in-app purchases, starting at $2.99 per month. Whichever you choose, the download price is not the number that matters.

Neptune Odyssey ships an update every 2 months, Better Keep every 4 days. The most recent releases landed on October 12, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Neptune Odyssey | Better Keep |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 4 days** |
| Size | 49 MB | 53 MB |
| Requires iOS | 15.1 | **15.0** |
| Devices | iPhone, iPad, iPod | **iPhone, iPad, iPod, Mac** |
| Age rating | 17+ | 12+ |
| Developer | [Neptune AI LLC](https://appshunter.io/developer/1871364974) | [Foxbiz Software Private Limited](https://appshunter.io/developer/1879446516) |

## 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 |


### Better Keep

[App page](https://appshunter.io/ios/app/better-keep-private-notes/id6759548198)

**Features:** Family Sharing, Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Better Keep Pro Monthly | $2.99 | per month |
| Better Keep Pro Yearly | $20.99 | per year |


## Frequently asked questions

### Is Neptune Odyssey free?

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

### Is Better Keep free?

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

### Do Neptune Odyssey or Better Keep have ads?

Neither Neptune Odyssey nor Better Keep shows ads.

### Which is updated more often, Neptune Odyssey or Better Keep?

Neptune Odyssey ships an update every 2 months, and Better Keep every 4 days. Most recently, Neptune Odyssey was updated on October 12, 2026 and Better Keep 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.*