# Knowvo Teacher vs Touch Trigonometry

The clearest difference is in-app purchases: Knowvo Teacher at none against Touch Trigonometry's 1. Knowvo Teacher also leads on iOS requirement (12.4 vs 15.1). Touch Trigonometry's advantage is device support. On price there is nothing between them.

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

## The numbers

| Metric | Knowvo Teacher | Touch Trigonometry |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | — | No |
| Size | 15 MB | 48 MB |
| Requires iOS | **12.4** | 15.1 |
| Devices | — | **iPhone, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Novus Learning](https://appshunter.io/developer/1686714769) | [Aisatsu LLC](https://appshunter.io/developer/1874553323) |

## What reviewers say

### Knowvo Teacher

[App page](https://appshunter.io/ios/app/knowvo-teacher/id6504847086)

**In-app purchases:** none


### Touch Trigonometry

[App page](https://appshunter.io/ios/app/touch-trigonometry/id6758712159)

**Features:** macOS Compatibility, Family Sharing

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Touch Trigonometry | $4.99 | one-time |


## Frequently asked questions

### Is Knowvo Teacher free?

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

### Is Touch Trigonometry free?

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

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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.*