# Big O Notation vs Coloring & Drawing Book

The clearest difference is in-app purchases: Big O Notation at none against Coloring & Drawing Book's 1. Big O Notation also leads on iOS requirement (15.1 vs 17.0). On price, ads and device support there is nothing between them.

Both are free to download. Coloring & Drawing Book sells 1 one-off in-app purchase. Big O Notation asks for nothing beyond the download.

## The numbers

| Metric | Big O Notation | Coloring & Drawing Book |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | — | Every 2 weeks |
| Size | 38 MB | 12 MB |
| Requires iOS | **15.1** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [AFTW LLC](https://appshunter.io/developer/1886356149) | [Alteru Inc.](https://appshunter.io/developer/434747758) |

## What reviewers say

### Big O Notation

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

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

**In-app purchases:** none


### Coloring & Drawing Book

[App page](https://appshunter.io/ios/app/coloring-and-drawing-book/id6772065881)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Coloring & Drawing Book Unlimited | $2.99 | one-time |


## Frequently asked questions

### Is Big O Notation free?

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

### Is Coloring & Drawing Book free?

Coloring & Drawing Book is free to download, with in-app purchases available.

### Do Big O Notation or Coloring & Drawing Book have ads?

Neither Big O Notation nor Coloring & Drawing Book 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.*