# Collatz Explorer vs MyCISA

The clearest difference is update cadence: MyCISA at weekly against Collatz Explorer's monthly. MyCISA also leads on device support (3 vs 1) and iOS requirement (15.1 vs 18.6). On price, ads and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Collatz Explorer ships an update monthly, MyCISA weekly. The most recent releases landed on October 24, 2026 and October 19, 2026 respectively.

## The numbers

| Metric | Collatz Explorer | MyCISA |
| --- | --- | --- |
| 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 | No |
| Ads | No | No |
| Update frequency | Monthly | **Weekly** |
| Monetization | Free | — |
| Size | 1 MB | 37 MB |
| Requires iOS | 18.6 | **15.1** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Berk Sucu](https://appshunter.io/developer/1852063488) | [Edunology](https://appshunter.io/developer/6807015798) |

## 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


### MyCISA

[App page](https://appshunter.io/ios/app/mycisa/id6807015796)

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

**In-app purchases:** none


## Frequently asked questions

### Is Collatz Explorer free?

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

### Is MyCISA free?

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

### Do Collatz Explorer or MyCISA have ads?

Neither Collatz Explorer nor MyCISA shows ads.

### Which is updated more often, Collatz Explorer or MyCISA?

Collatz Explorer ships an update monthly, and MyCISA weekly. Most recently, Collatz Explorer was updated on October 24, 2026 and MyCISA on October 19, 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.*