# Reflecting on mistakes vs 知识树

The clearest difference is price: 知识树 at Free against Reflecting on mistakes's $8.99. 知识树 also leads on update cadence (every 5 days vs every 3 months). Reflecting on mistakes's advantage is in-app purchases (none vs 4) and iOS requirement (14.0 vs 17.0). On ads and device support there is nothing between them.

知识树 is free to download; Reflecting on mistakes costs $8.99 up front. 知识树 sells 4 in-app purchases, starting at $2.99 per month. Reflecting on mistakes asks for nothing beyond the download.

Reflecting on mistakes ships an update every 3 months, 知识树 every 5 days. The most recent releases landed on November 7, 2026 and November 1, 2026 respectively.

## The numbers

| Metric | Reflecting on mistakes | 知识树 |
| --- | --- | --- |
| Price | $8.99 | **Free** |
| Rating | — | **[4.2 (5 ratings)](https://appshunter.io/ios/app/ai/id6505133670/reviews)** |
| Number of ratings | — | **5** |
| Positive reviews | — | 36.8% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 5 days** |
| Monetization | — | Freemium |
| Size | 4 MB | 2 MB |
| Requires iOS | **14.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [维华 肖](https://appshunter.io/developer/925691567) | [野 匡](https://appshunter.io/developer/819954894) |

## What reviewers say

### Reflecting on mistakes

[App page](https://appshunter.io/ios/app/reflecting-on-mistakes/id1533557358)

**Features:** macOS Compatibility

**In-app purchases:** none


### 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 |


## Frequently asked questions

### Is Reflecting on mistakes free?

Reflecting on mistakes costs $8.99, with no in-app purchases.

### Is 知识树 free?

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

### Do Reflecting on mistakes or 知识树 have ads?

Neither Reflecting on mistakes nor 知识树 shows ads.

### Which is updated more often, Reflecting on mistakes or 知识树?

Reflecting on mistakes ships an update every 3 months, and 知识树 every 5 days. Most recently, Reflecting on mistakes was updated on November 7, 2026 and 知识树 on November 1, 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.*