# Operating Systems Quiz (BSCS) vs Big O Notation

The clearest difference is in-app purchases: Big O Notation at none against Operating Systems Quiz (BSCS)'s 7. Big O Notation also leads on ads (none vs shown). Operating Systems Quiz (BSCS)'s advantage is iOS requirement (12.0 vs 15.1). On price and device support there is nothing between them.

Both are free to download. Operating Systems Quiz (BSCS) sells 7 in-app purchases, starting at $4.99 per month. Big O Notation asks for nothing beyond the download.

## The numbers

| Metric | Operating Systems Quiz (BSCS) | Big O Notation |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 3 weeks | — |
| Size | 68 MB | 38 MB |
| Requires iOS | **12.0** | 15.1 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Arshad Iqbal](https://appshunter.io/developer/1547001151) | [AFTW LLC](https://appshunter.io/developer/1886356149) |

## What reviewers say

### Operating Systems Quiz (BSCS)

[App page](https://appshunter.io/ios/app/operating-systems-quiz-bscs/id1581425762)

**Features:** macOS Compatibility

**In-app purchases (7)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 1 Month Package | $4.99 | per month |
| 3 Months Package | $9.99 | per 3 months |
| 6 Months Package | $14.99 | per 6 months |
| 1 Year Package | $19.99 | per year |
| 1500 Coins | $0.99 | one-time |
| 3500 Coins | $1.99 | one-time |
| 6000 Coins | $2.99 | one-time |


### Big O Notation

[App page](https://appshunter.io/ios/app/big-o-notation/id6771656290)

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

**In-app purchases:** none


## Frequently asked questions

### Is Operating Systems Quiz (BSCS) free?

Operating Systems Quiz (BSCS) is free to download, with in-app purchases available.

### Is Big O Notation free?

Big O Notation is free to download, with no in-app purchases.

### Do Operating Systems Quiz (BSCS) or Big O Notation have ads?

Operating Systems Quiz (BSCS) shows ads; Big O Notation does not.

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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.*