# Sci vs Quantum Messages

The clearest difference is in-app purchases: Sci at none against Quantum Messages's 1. Sci also leads on iOS requirement (13.0 vs 17.0). On price, ads and device support there is nothing between them.

Both are free to download. Quantum Messages sells 1 one-off in-app purchase. Sci asks for nothing beyond the download.

## The numbers

| Metric | Sci | Quantum Messages |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 5 weeks | — |
| Size | 88 MB | 2 MB |
| Requires iOS | **13.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| 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) | [嘉胜 陈](https://appshunter.io/developer/1508884749) |

## What reviewers say

### Sci

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

**In-app purchases:** none


### Quantum Messages

[App page](https://appshunter.io/ios/app/quantum-messages/id6747940707)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro | $19.99 | one-time |


## Frequently asked questions

### Is Sci free?

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

### Is Quantum Messages free?

Quantum Messages is free to download, with in-app purchases available.

### Do Sci or Quantum Messages have ads?

Neither Sci nor Quantum Messages shows ads.

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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.*