# Prism Notes vs Kosshi Outliner

The clearest difference is ratings volume: Prism Notes at 38 against Kosshi Outliner's 4. On price, rating, review sentiment and update cadence there is nothing between them.

Both are free to download. Prism Notes sells 2 one-off in-app purchases and Kosshi Outliner sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

On the App Store both sit at effectively the same score — 4.9 for Prism Notes against 5.0 for Kosshi Outliner. That said, the two scores are not equally well evidenced: Prism Notes has 38 ratings behind it against 4, so its average is the more settled of the two. Written reviews split almost evenly too, at 100% and 100% positive.

Both ship on a similar rhythm, roughly every 3 days. The most recent releases landed on October 25, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Prism Notes | Kosshi Outliner |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.9 (38 ratings)](https://appshunter.io/ios/app/prism-notes/id6754857785/reviews) | **[5.0 (4 ratings)](https://appshunter.io/ios/app/kosshi-outliner/id6759483880/reviews)** |
| Number of ratings | **38** | 4 |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 3 days | Every 3 days |
| Monetization | Free | Free |
| Size | 24 MB | 30 MB |
| Requires iOS | 18.6 | **17.0** |
| Devices | **iPhone, iPad, Mac, Apple Watch** | iPhone, iPad, Mac |
| Age rating | 4+ | 4+ |
| Developer | [Tommy Joseph](https://appshunter.io/developer/1850558223) | [Junichi Sato](https://appshunter.io/developer/1617496266) |

## What reviewers say

### Prism Notes

[App page](https://appshunter.io/ios/app/prism-notes/id6754857785)

Capture thoughts and links quickly with a familiar texting interface. Organize ideas with AI-suggested tags and develop them across linked threads. Review notes to keep what matters and easily search by keyword or meaning.

**Highlights:** Texting-like note capture, AI-suggested tags, Threaded idea development, Review mode for notes, Sync across devices, Natural language reminders, Lock screen capture

**Features:** Family Sharing, Apple Watch app, Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Lifetime Unlock | $6.99 | one-time |
| Lifetime Unlock | $12.99 | one-time |


### Kosshi Outliner

[App page](https://appshunter.io/ios/app/kosshi-outliner/id6759483880)

This native outliner app allows you to organize thoughts with a hierarchical structure, zoom into specific sections, and format text using Markdown. It supports images, sketches, internal links, and reminders, with seamless iCloud sync across Apple devices.

**Highlights:** Hierarchical outlining with indentation, Zoom into specific rows, Markdown formatting, Image and file embedding, Apple Pencil sketches, Internal linking, Reminders and calendar sync

**Features:** Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Kosshi Outliner | $24.99 | one-time |


## Frequently asked questions

### Is Prism Notes free?

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

### Is Kosshi Outliner free?

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

### Which has better reviews, Prism Notes or Kosshi Outliner?

Kosshi Outliner is rated higher. Prism Notes averages 4.9 out of 5 from 38 ratings, while Kosshi Outliner averages 5.0 from 4 ratings.

### Do Prism Notes or Kosshi Outliner have ads?

Neither Prism Notes nor Kosshi Outliner shows ads.

### Which is updated more often, Prism Notes or Kosshi Outliner?

Prism Notes ships an update every 3 days, and Kosshi Outliner every 3 days. Most recently, Prism Notes was updated on October 25, 2026 and Kosshi Outliner 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.*