# Collatz Explorer vs Touch Trigonometry

The clearest difference is in-app purchases: Collatz Explorer at none against Touch Trigonometry's 1. Touch Trigonometry's advantage is iOS requirement (15.1 vs 18.6). On price, ads and device support there is nothing between them.

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

## The numbers

| Metric | Collatz Explorer | Touch Trigonometry |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.6 (7 ratings)](https://appshunter.io/ios/app/collatz-explorer/id6755121221/reviews)** | — |
| Number of ratings | **7** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Monthly | — |
| Monetization | Free | — |
| Size | 1 MB | 48 MB |
| Requires iOS | 18.6 | **15.1** |
| Devices | iPhone | **iPhone, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Berk Sucu](https://appshunter.io/developer/1852063488) | [Aisatsu LLC](https://appshunter.io/developer/1874553323) |

## What reviewers say

### Collatz Explorer

[App page](https://appshunter.io/ios/app/collatz-explorer/id6755121221)

Explore mathematical sequences with this app. It calculates the standard Collatz sequence for any number you enter and can also display sequences from an alternative 3x-1 function.

**Highlights:** Calculate Collatz sequences, Calculate 3x-1 function sequences, Input any number, Visualize sequences

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

**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 Collatz Explorer free?

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

### Is Touch Trigonometry free?

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

### Do Collatz Explorer or Touch Trigonometry have ads?

Neither Collatz Explorer 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.*