# GT Graph vs Touch Trigonometry

The clearest difference is iOS requirement: Touch Trigonometry at 15.1 against GT Graph's 18.0. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. GT Graph sells 1 one-off in-app purchase and Touch Trigonometry sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

## The numbers

| Metric | GT Graph | Touch Trigonometry |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 8 days | — |
| Size | 1 MB | 48 MB |
| Requires iOS | 18.0 | **15.1** |
| Devices | **iPhone, iPad, Mac** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Gennaro Eduardo Tangari](https://appshunter.io/developer/1616502345) | [Aisatsu LLC](https://appshunter.io/developer/1874553323) |

## What reviewers say

### GT Graph

[App page](https://appshunter.io/ios/app/gt-graph/id6757393417)

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| GT Graph In-App Purchase | $0.99 | one-time |


### 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 GT Graph free?

GT Graph is free to download, with in-app purchases available.

### Is Touch Trigonometry free?

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

### Do GT Graph or Touch Trigonometry have ads?

Neither GT Graph nor Touch Trigonometry 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.*