# Sci vs E

The clearest difference is update cadence: E at every 9 days against Sci's every 6 weeks. 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.

Sci ships an update every 6 weeks, E every 9 days. The most recent releases landed on September 27, 2026 and September 15, 2026 respectively.

## The numbers

| Metric | Sci | E |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 6 weeks | **Every 9 days** |
| Size | 86 MB | 12 MB |
| Requires iOS | 13.0 | **12.4** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 17+ |
| Developer | [山东远大朗威教育科技股份有限公司](https://appshunter.io/developer/1197726190) | [Rashmi Jain](https://appshunter.io/developer/1715242296) |

## What reviewers say

### Sci

[App page](https://appshunter.io/ios/app/sci-lab-primary/id1387072836)

**In-app purchases:** none


### E

[App page](https://appshunter.io/ios/app/e-star-book/id6471396335)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Sci free?

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

### Is E free?

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

### Do Sci or E have ads?

Neither Sci nor E shows ads.

### Which is updated more often, Sci or E?

Sci ships an update every 6 weeks, and E every 9 days. Most recently, Sci was updated on September 27, 2026 and E on September 15, 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.*