# Sci vs DS随心转

The clearest difference is in-app purchases: Sci at none against DS随心转's 5. Sci also leads on iOS requirement (13.0 vs 15.6). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. DS随心转 sells 5 one-off in-app purchases. Sci asks for nothing beyond the download.

Sci ships an update every 5 weeks, DS随心转 every 2 months. The most recent releases landed on October 29, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | Sci | DS随心转 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 5 weeks** | Every 2 months |
| Size | 88 MB | 28 MB |
| Requires iOS | **13.0** | 15.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, 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) | [Guangzhou Qingyue Network Technology Co. Ltd.](https://appshunter.io/developer/1525046276) |

## What reviewers say

### Sci

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

**In-app purchases:** none


### DS随心转

[App page](https://appshunter.io/ios/app/ds-aiword/id6744355450)

**Features:** macOS Compatibility

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| DS随心转新用户专享 | $0.99 | one-time |
| DS随心转月会员 | $2.99 | one-time |
| DS随心转周会员 | $2.99 | one-time |
| DS随心转年会员 | $39.99 | one-time |
| DS随心转终身会员 | $119.99 | one-time |


## Frequently asked questions

### Is Sci free?

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

### Is DS随心转 free?

DS随心转 is free to download, with in-app purchases available.

### Do Sci or DS随心转 have ads?

Neither Sci nor DS随心转 shows ads.

### Which is updated more often, Sci or DS随心转?

Sci ships an update every 5 weeks, and DS随心转 every 2 months. Most recently, Sci was updated on October 29, 2026 and DS随心转 on October 7, 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.*