# 掌上DS vs 智能记忆助手

The clearest difference is in-app purchases: 掌上DS at none against 智能记忆助手's 10. 智能记忆助手's advantage is ads (none vs shown). On price, update cadence, device support and iOS requirement there is nothing between them.

Both are free to download. 智能记忆助手 sells 10 one-off in-app purchases. 掌上DS asks for nothing beyond the download.

掌上DS ships an update every 9 days, 智能记忆助手 every 6 days. The most recent releases landed on October 25, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | 掌上DS | 智能记忆助手 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 9 days | **Every 6 days** |
| Size | 43 MB | 136 MB |
| Requires iOS | 12.0 | **11.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 17+ | 4+ |
| Developer | [EFORYOU INC](https://appshunter.io/developer/1703173310) | [珍时信息技术(上海)有限公司](https://appshunter.io/developer/1464297277) |

## What reviewers say

### 掌上DS

[App page](https://appshunter.io/ios/app/ds/id6740013016)

**Features:** macOS Compatibility

**In-app purchases:** none


### 智能记忆助手

[App page](https://appshunter.io/ios/app/id6755584785)

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

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 初中实词六年级上 | $6.99 | one-time |
| 初中实词六年级下 | $6.99 | one-time |
| 初中古诗词九年级下 | $14.99 | one-time |
| 初中古诗词八年级上 | $29.99 | one-time |
| 初中古诗词六年级上 | $29.99 | one-time |
| 初中古诗词八年级下 | $29.99 | one-time |
| 初中古诗词九年级上 | $29.99 | one-time |
| 初中古诗词六年级下 | $49.99 | one-time |
| 中考实词150 | $89.99 | one-time |
| 中考古诗文 | $199.99 | one-time |


## Frequently asked questions

### Is 掌上DS free?

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

### Is 智能记忆助手 free?

智能记忆助手 is free to download, with in-app purchases available.

### Do 掌上DS or 智能记忆助手 have ads?

掌上DS shows ads; 智能记忆助手 does not.

### Which is updated more often, 掌上DS or 智能记忆助手?

掌上DS ships an update every 9 days, and 智能记忆助手 every 6 days. Most recently, 掌上DS was updated on October 25, 2026 and 智能记忆助手 on October 30, 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.*