# 双元E+ vs 研助理

The clearest difference is in-app purchases: 双元E+ at none against 研助理's 1. 研助理's advantage is update cadence (every 11 days vs every 16 months). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. 研助理 sells 1 one-off in-app purchase. 双元E+ asks for nothing beyond the download.

双元E+ ships an update every 16 months, 研助理 every 11 days. The most recent releases landed on October 13, 2026 and September 18, 2026 respectively.

## The numbers

| Metric | 双元E+ | 研助理 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[1.0 (2 ratings)](https://appshunter.io/ios/app/e-plus/id1483094594/reviews)** | — |
| Number of ratings | **2** | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 16 months | **Every 11 days** |
| Monetization | Free | — |
| Size | 48 MB | 37 MB |
| Requires iOS | 11.0 | 11.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Shanghai Yusu Information Technology Co.,Ltd.](https://appshunter.io/developer/1395703934) | [菊花 张](https://appshunter.io/developer/1678039299) |

## What reviewers say

### 双元E+

[App page](https://appshunter.io/ios/app/e-plus/id1483094594)

This app extends a smart campus system, allowing students, teachers, and mentors to manage and engage in educational activities remotely. Users receive real-time event notifications and can access learning progress, course selection, and feedback features on their mobile devices.

**Highlights:** Remote management and teaching, Real-time event notifications, Student progress tracking, Course selection and feedback, Communication platform

**Features:** macOS Compatibility

**In-app purchases:** none


### 研助理

[App page](https://appshunter.io/ios/app/id6457256544)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 管理类联考综合•逻辑•精讲课 | $299.99 | one-time |


## Frequently asked questions

### Is 双元E+ free?

双元E+ is free to download, with no in-app purchases.

### Is 研助理 free?

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

### Do 双元E+ or 研助理 have ads?

Neither 双元E+ nor 研助理 shows ads.

### Which is updated more often, 双元E+ or 研助理?

双元E+ ships an update every 16 months, and 研助理 every 11 days. Most recently, 双元E+ was updated on October 13, 2026 and 研助理 on September 18, 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.*