# Kidsbook vs Beautiful Trigonometry

The clearest difference is in-app purchases: Kidsbook at none against Beautiful Trigonometry's 1. Kidsbook also leads on update cadence (weekly vs every 3 months) and iOS requirement (15.5 vs 17.6). On price, ads and device support there is nothing between them.

Both are free to download. Beautiful Trigonometry sells 1 one-off in-app purchase. Kidsbook asks for nothing beyond the download.

Kidsbook ships an update weekly, Beautiful Trigonometry every 3 months. The most recent releases landed on November 3, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | Kidsbook | Beautiful Trigonometry |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Weekly** | Every 3 months |
| Size | 60 MB | 8 MB |
| Requires iOS | **15.5** | 17.6 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [View Concept sp. z o.o.](https://appshunter.io/developer/1515103453) | [Tomasz Rygula](https://appshunter.io/developer/879228654) |

## What reviewers say

### Kidsbook

[App page](https://appshunter.io/ios/app/kidsbook/id1642511389)

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

**In-app purchases:** none


### Beautiful Trigonometry

[App page](https://appshunter.io/ios/app/beautiful-trigonometry/id6746460113)

**Features:** macOS Compatibility, Family Sharing

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Full Trigonometry Access | $1.99 | one-time |


## Frequently asked questions

### Is Kidsbook free?

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

### Is Beautiful Trigonometry free?

Beautiful Trigonometry is free to download, with in-app purchases available.

### Do Kidsbook or Beautiful Trigonometry have ads?

Neither Kidsbook nor Beautiful Trigonometry shows ads.

### Which is updated more often, Kidsbook or Beautiful Trigonometry?

Kidsbook ships an update weekly, and Beautiful Trigonometry every 3 months. Most recently, Kidsbook was updated on November 3, 2026 and Beautiful Trigonometry on October 25, 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.*