# Knowunity vs Sapium

The clearest difference is in-app purchases: Sapium at none against Knowunity's 10. Sapium also leads on rating (5.0 vs 4.7). Knowunity's advantage is update cadence (daily vs fortnightly) and ratings volume (13K vs 1). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Knowunity sells 10 in-app purchases, starting at $4.99 per 7 days. Sapium asks for nothing beyond the download.

Sapium holds the better App Store score, 5.0 against 4.7. That said, the two scores are not equally well evidenced: Knowunity has 13K ratings behind it against 1, so its average is the more settled of the two.

Knowunity ships an update daily, Sapium fortnightly. The most recent releases landed on November 11, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | Knowunity | Sapium |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.7 (13K ratings)](https://appshunter.io/ios/app/knowunity-ai-study-and-homework/id1484296272/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/sapium-book-summaries/id6759169076/reviews)** |
| Number of ratings | **13K** | 1 |
| Positive reviews | 82.3% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | Yes |
| Update frequency | **Daily** | Fortnightly |
| Monetization | Free with in-app purchases | **Ad-supported** |
| Best chart rank | **#9** | — |
| Size | 238 MB | 70 MB |
| Requires iOS | 15.5 | **15.1** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Knowunity GmbH](https://appshunter.io/developer/1484296271) | [Cristian Banuls Mahiques](https://appshunter.io/developer/1877146011) |

## What reviewers say

### Knowunity

[App page](https://appshunter.io/ios/app/knowunity-ai-study-and-homework/id1484296272)

**Currently charting:** #9 Top Free · Education, #98 Top Grossing · Education (US App Store)

This AI-powered learning companion creates personalized study plans for exams and homework. It transforms uploaded materials into study tools like flashcards and quizzes, and offers AI-scored mock exams. Connect with a community of students for shared notes and practice.

**Highlights:** Personalized AI study plans, Flashcards and quizzes, Voice recall and AI tutor chat, Homework problem solver, Material conversion to study tools, AI-scored mock exams, Community notes and solutions

**Features:** Family Sharing

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Knowunity Lite | $4.99 | per 7 days |
| Knowunity Max | $14.99 | per 7 days |
| Knowunity Max | $23.99 | per month |
| Knowunity Pro | $25.99 | per 3 months |
| Knowunity Lite | $29.99 | per year |
| Knowunity Pro | $29.99 | per 3 months |
| Knowunity Pro | $33.99 | per 3 months |
| Knowunity Pro | $49.99 | per year |
| Knowunity Pro | $61.99 | per year |
| Knowunity Max | $74.99 | per year |

**What reviewers like**

- 🚀 Helpful AI assistant
- 👍 Useful revision notes and flashcards
- 💡 Collaborative community features
- 🚀 Efficient study tools
- 👍 Free app with no ads

**What reviewers complain about**

- 🔒 Paywall for premium features
- 🐛 Bugs and glitches in the app
- 🔒 Restricted access for younger users
- 🐛 Inconsistent user experience after updates

**Reported bugs**

- Frequent app crashes and freezes
- Issues with uploading and saving notes
- Problems with group chat functionality
- Inconsistent behavior when navigating the app

**Requested features**

- Add more advanced class options
- Improve search and organization of notes
- Implement a draft feature for creating study materials
- Add more customization options


### Sapium

[App page](https://appshunter.io/ios/app/sapium-book-summaries/id6759169076)

Transform idle time into learning with bite-sized ideas from books, podcasts, and essays. Enjoy personalized content, build an idea library, and listen on the go. Gamified features encourage daily learning.

**Highlights:** Bite-sized ideas from books and podcasts, Personalized content feed, Save and organize ideas, Audio mode for learning on the go, Gamified learning with streaks and XP, AI assistant for deeper insights, Available in 12 languages

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

**In-app purchases:** none


## Frequently asked questions

### Is Knowunity free?

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

### Is Sapium free?

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

### Which has better reviews, Knowunity or Sapium?

Sapium is rated higher. Knowunity averages 4.7 out of 5 from 13K ratings, while Sapium averages 5.0 from 1 ratings.

### Do Knowunity or Sapium have ads?

Both Knowunity and Sapium show ads.

### Which is updated more often, Knowunity or Sapium?

Knowunity ships an update daily, and Sapium fortnightly. Most recently, Knowunity was updated on November 11, 2026 and Sapium on October 31, 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.*