# Prism Notes vs Readium

The clearest difference is in-app purchases: Readium at none against Prism Notes's 2. Readium also leads on iOS requirement (16.4 vs 18.6). Prism Notes's advantage is ratings volume (33 vs 4) and device support (4 vs 2). 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. Readium asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 4.9 for Prism Notes against 5.0 for Readium. That said, the two scores are not equally well evidenced: Prism Notes has 33 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.

Prism Notes ships an update every 4 days, Readium every 6 days. The most recent releases landed on October 17, 2026 and October 15, 2026 respectively.

## The numbers

| Metric | Prism Notes | Readium |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.9 (33 ratings)](https://appshunter.io/ios/app/prism-notes/id6754857785/reviews) | **[5.0 (4 ratings)](https://appshunter.io/ios/app/readium-text-to-speech-pdf/id6798495748/reviews)** |
| Number of ratings | **33** | 4 |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 4 days** | Every 6 days |
| Monetization | Free | Free |
| Size | 19 MB | 106 MB |
| Requires iOS | 18.6 | **16.4** |
| Devices | **iPhone, iPad, Mac, Apple Watch** | iPhone, iPad |
| Age rating | 4+ | 12+ |
| Developer | [Tommy Joseph](https://appshunter.io/developer/1850558223) | [Raquib Ul Alam](https://appshunter.io/developer/6798495750) |

## 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 |


### Readium

[App page](https://appshunter.io/ios/app/readium-text-to-speech-pdf/id6798495748)

Transform any text document, PDF, or web article into a natural-sounding audiobook. Follow along with highlighted words in real-time for improved focus and recall. Offers lifelike AI voices and offline playback for a private, distraction-free reading experience.

**Highlights:** Text-to-speech audiobook conversion, Real-time word highlighting, Lifelike AI and offline voices, Distraction-free reader with themes, Background playback with lockscreen controls, Supports EPUB, PDF, MOBI, and web articles, Adjustable playback speed

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

**In-app purchases:** none


## Frequently asked questions

### Is Prism Notes free?

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

### Is Readium free?

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

### Which has better reviews, Prism Notes or Readium?

Readium is rated higher. Prism Notes averages 4.9 out of 5 from 33 ratings, while Readium averages 5.0 from 4 ratings.

### Do Prism Notes or Readium have ads?

Neither Prism Notes nor Readium shows ads.

### Which is updated more often, Prism Notes or Readium?

Prism Notes ships an update every 4 days, and Readium every 6 days. Most recently, Prism Notes was updated on October 17, 2026 and Readium on October 15, 2026.

---

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