# Beautiful Planimetry vs Collatz Explorer

The clearest difference is in-app purchases: Collatz Explorer at none against Beautiful Planimetry's 1. On price, update cadence, ads and device support there is nothing between them.

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

Beautiful Planimetry ships an update every 3 weeks, Collatz Explorer monthly. The most recent releases landed on September 8, 2026 and September 9, 2026 respectively.

## The numbers

| Metric | Beautiful Planimetry | Collatz Explorer |
| --- | --- | --- |
| 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 | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Monthly |
| Monetization | — | Free |
| Size | 8 MB | 1 MB |
| Requires iOS | **18.5** | 18.6 |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Tomasz Rygula](https://appshunter.io/developer/879228654) | [Berk Sucu](https://appshunter.io/developer/1852063488) |

## What reviewers say

### Beautiful Planimetry

[App page](https://appshunter.io/ios/app/beautiful-planimetry/id6752787683)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Full Planimetry Access | $4.99 | one-time |


### 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


## Frequently asked questions

### Is Beautiful Planimetry free?

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

### Is Collatz Explorer free?

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

### Do Beautiful Planimetry or Collatz Explorer have ads?

Neither Beautiful Planimetry nor Collatz Explorer shows ads.

### Which is updated more often, Beautiful Planimetry or Collatz Explorer?

Beautiful Planimetry ships an update every 3 weeks, and Collatz Explorer monthly. Most recently, Beautiful Planimetry was updated on September 8, 2026 and Collatz Explorer on September 9, 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.*