# SiYuan vs KNOWLY AI

The clearest difference is rating: KNOWLY AI at 5.0 against SiYuan's 3.9. KNOWLY AI also leads on review sentiment (100% vs 67%) and update cadence (every 3 days vs every 8 days). SiYuan's advantage is ratings volume (30 vs 1). On price, ads, in-app purchases and monetization model there is nothing between them.

Both are free to download. SiYuan sells 2 one-off in-app purchases and KNOWLY AI sells 2 in-app purchases, starting at $4.99 per month. Whichever you choose, the download price is not the number that matters.

KNOWLY AI holds the better App Store score, 5.0 against 3.9. That said, the two scores are not equally well evidenced: SiYuan has 30 ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 67% of SiYuan's written reviews are positive against 100% of KNOWLY AI's.

SiYuan ships an update every 8 days, KNOWLY AI every 3 days. The most recent releases landed on November 3, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | SiYuan | KNOWLY AI |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.9 (30 ratings)](https://appshunter.io/ios/app/siyuan/id1583226508/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/knowly-ai-document-analyzer/id6760889568/reviews)** |
| Number of ratings | **30** | 1 |
| Positive reviews | 66.7% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 8 days | **Every 3 days** |
| Monetization | Free with in-app purchases | Freemium |
| Size | 440 MB | 18 MB |
| Requires iOS | 17.0 | **15.0** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 17+ | 17+ |
| Developer | [Yunnan Liandi Technology Co., Ltd.](https://appshunter.io/developer/1583226510) | [TEMNE ADAH HARDAWAY](https://appshunter.io/developer/1874712586) |

## What reviewers say

### SiYuan

[App page](https://appshunter.io/ios/app/siyuan/id1583226508)

A privacy-focused personal knowledge management system that allows offline use and encrypted data synchronization. It combines blocks, outlines, and bidirectional links to enhance thinking processes.

**Highlights:** Privacy-first design, Offline data storage, End-to-end encrypted sync, Block and outline fusion, Bidirectional linking

**Features:** Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| PRO Features | $79.99 | one-time |
| Subscription | $188.99 | one-time |


### KNOWLY AI

[App page](https://appshunter.io/ios/app/knowly-ai-document-analyzer/id6760889568)

This AI-powered tool helps you quickly understand and simplify complex information. It extracts key details from documents, articles, and conversations, providing clear explanations and insights for learning and productivity.

**Highlights:** Text scanning and smart extraction, Clear summaries of content, Easy-to-understand explanations, Document comparison tools, Fast insights for learning and organizing

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium monthly | $4.99 | per month |
| Premium annual | $39.99 | per year |


## Frequently asked questions

### Is SiYuan free?

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

### Is KNOWLY AI free?

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

### Which has better reviews, SiYuan or KNOWLY AI?

KNOWLY AI is rated higher. SiYuan averages 3.9 out of 5 from 30 ratings, while KNOWLY AI averages 5.0 from 1 ratings.

### Do SiYuan or KNOWLY AI have ads?

Neither SiYuan nor KNOWLY AI shows ads.

### Which is updated more often, SiYuan or KNOWLY AI?

SiYuan ships an update every 8 days, and KNOWLY AI every 3 days. Most recently, SiYuan was updated on November 3, 2026 and KNOWLY AI 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.*