# 知识树 vs LockStudy

The clearest difference is update cadence: 知识树 at every 5 days against LockStudy's monthly. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. 知识树 sells 4 in-app purchases, starting at $2.99 per month and LockStudy sells 2 in-app purchases, starting at $1.99 per month. Whichever you choose, the download price is not the number that matters.

知识树 ships an update every 5 days, LockStudy monthly. Both last shipped on September 23, 2026.

## The numbers

| Metric | 知识树 | LockStudy |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.2 (5 ratings)](https://appshunter.io/ios/app/ai/id6505133670/reviews)** | — |
| Number of ratings | **5** | — |
| Positive reviews | 38.9% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 5 days** | Monthly |
| Monetization | Freemium | — |
| Size | 2 MB | 8 MB |
| Requires iOS | **17.0** | 17.6 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [野 匡](https://appshunter.io/developer/819954894) | [Glanz Studio](https://appshunter.io/developer/1785357972) |

## What reviewers say

### 知识树

[App page](https://appshunter.io/ios/app/ai/id6505133670)

This intelligent learning system uses AI to understand knowledge, break down concepts, and dynamically schedule practice and review based on your memory state. It focuses on true retention through spaced repetition and scientific memory curves, not just completing exercises.

**Highlights:** AI-driven knowledge understanding, Dynamic practice and review scheduling, Breakdown of knowledge into testable points, Spaced repetition for long-term memory, Automatic assessment of mastery, Progress tracking over speed

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 月度会员 | $2.99 | per month |
| 季度会员 | $4.99 | per 3 months |
| 年度会员 | $19.99 | per year |
| 终身会员 | $24.99 | one-time |


### LockStudy

[App page](https://appshunter.io/ios/app/lockstudy-built-for-focus/id6756006023)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| LockStudy Pro Monthly | $1.99 | per month |
| LockStudy Pro Lifetime | $22.99 | one-time |


## Frequently asked questions

### Is 知识树 free?

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

### Is LockStudy free?

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

### Do 知识树 or LockStudy have ads?

Neither 知识树 nor LockStudy shows ads.

### Which is updated more often, 知识树 or LockStudy?

知识树 ships an update every 5 days, and LockStudy monthly. Most recently, 知识树 was updated on September 23, 2026 and LockStudy on September 23, 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.*