# Sci vs 常有优学

The clearest difference is ads: Sci at none against 常有优学's shown. Sci also leads on update cadence (every 5 weeks vs every 3 months). On price, in-app purchases, device support and iOS requirement 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 5 weeks, 常有优学 every 3 months. The most recent releases landed on September 13, 2026 and September 17, 2026 respectively.

## The numbers

| Metric | Sci | 常有优学 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | **Every 5 weeks** | Every 3 months |
| Size | 88 MB | 40 MB |
| Requires iOS | 13.0 | 13.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [山东远大朗威教育科技股份有限公司](https://appshunter.io/developer/1197726190) | [常州万兆网络科技有限公司](https://appshunter.io/developer/1208589430) |

## What reviewers say

### Sci

[App page](https://appshunter.io/ios/app/sci-lab/id1197726221)

**In-app purchases:** none


### 常有优学

[App page](https://appshunter.io/ios/app/id1668705598)

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

**In-app purchases:** none


## Frequently asked questions

### Is Sci free?

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

### Is 常有优学 free?

常有优学 is free to download, with no in-app purchases.

### Do Sci or 常有优学 have ads?

常有优学 shows ads; Sci does not.

### Which is updated more often, Sci or 常有优学?

Sci ships an update every 5 weeks, and 常有优学 every 3 months. Most recently, Sci was updated on September 13, 2026 and 常有优学 on September 17, 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.*