# 掌上文理 vs E

The clearest difference is update cadence: E at every 2 days against 掌上文理's every 3 months. 掌上文理's advantage is iOS requirement (9.0 vs 12.0). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

掌上文理 ships an update every 3 months, E every 2 days. The most recent releases landed on October 7, 2026 and October 4, 2026 respectively.

## The numbers

| Metric | 掌上文理 | E |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 2 days** |
| Size | 38 MB | 28 MB |
| Requires iOS | **9.0** | 12.0 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 17+ | 4+ |
| Developer | [Zhejiang Zhengyuan Zhihui Technology Co.,Ltd.](https://appshunter.io/developer/915266542) | [新 王](https://appshunter.io/developer/1114752169) |

## What reviewers say

### 掌上文理

[App page](https://appshunter.io/ios/app/id1322925324)

**Features:** macOS Compatibility

**In-app purchases:** none


### E

[App page](https://appshunter.io/ios/app/e-scooter/id6739862074)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is 掌上文理 free?

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

### Is E free?

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

### Do 掌上文理 or E have ads?

Neither 掌上文理 nor E shows ads.

### Which is updated more often, 掌上文理 or E?

掌上文理 ships an update every 3 months, and E every 2 days. Most recently, 掌上文理 was updated on October 7, 2026 and E on October 4, 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.*