# Memory Ark vs 今知错题本：批量拍照录题，思维导图笔记复习高效整理工具

The clearest difference is update cadence: 今知错题本：批量拍照录题，思维导图笔记复习高效整理工具 at every 4 days against Memory Ark's every 2 months. Memory Ark's advantage is iOS requirement (15.0 vs 17.5). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Memory Ark sells 2 in-app purchases, starting at $0.99 per month and 今知错题本：批量拍照录题，思维导图笔记复习高效整理工具 sells 1 in-app purchase, starting at $0.99 per month. Whichever you choose, the download price is not the number that matters.

Memory Ark ships an update every 2 months, 今知错题本：批量拍照录题，思维导图笔记复习高效整理工具 every 4 days. The most recent releases landed on October 7, 2026 and October 5, 2026 respectively.

## The numbers

| Metric | Memory Ark | 今知错题本：批量拍照录题，思维导图笔记复习高效整理工具 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/memory-ark/id6470735175/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 4 days** |
| Monetization | Free with in-app purchases | — |
| Size | 6 MB | 27 MB |
| Requires iOS | **15.0** | 17.5 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [世超 徐](https://appshunter.io/developer/1688946625) | [惠桐 董](https://appshunter.io/developer/1822284792) |

## What reviewers say

### Memory Ark

[App page](https://appshunter.io/ios/app/memory-ark/id6470735175)

This app helps users combat forgetting by using the Ebbinghaus Forgetting Curve to create personalized review schedules. It offers features like task management, progress tracking, and smart rescheduling to make learning more efficient and effective.

**Highlights:** Ebbinghaus Forgetting Curve integration, Daily and calendar task management, Task categorization with tags, Detailed review session data, Customizable memory curves, Smart task rescheduling, Retroactive check-in for missed tasks

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Membership | $0.99 | per month |
| Annual Membership | $2.99 | per year |


### 今知错题本：批量拍照录题，思维导图笔记复习高效整理工具

[App page](https://appshunter.io/ios/app/id6747738523)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 今知错题本月度Pro会员 | $0.99 | per month |


## Frequently asked questions

### Is Memory Ark free?

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

### Is 今知错题本：批量拍照录题，思维导图笔记复习高效整理工具 free?

今知错题本：批量拍照录题，思维导图笔记复习高效整理工具 is free to download, with in-app purchases available.

### Do Memory Ark or 今知错题本：批量拍照录题，思维导图笔记复习高效整理工具 have ads?

Neither Memory Ark nor 今知错题本：批量拍照录题，思维导图笔记复习高效整理工具 shows ads.

### Which is updated more often, Memory Ark or 今知错题本：批量拍照录题，思维导图笔记复习高效整理工具?

Memory Ark ships an update every 2 months, and 今知错题本：批量拍照录题，思维导图笔记复习高效整理工具 every 4 days. Most recently, Memory Ark was updated on October 7, 2026 and 今知错题本：批量拍照录题，思维导图笔记复习高效整理工具 on October 5, 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.*