# GCD and LCM vs RedEXOS

The clearest difference is price: RedEXOS at Free against GCD and LCM's $3.99. RedEXOS also leads on update cadence (every 2 months vs every 19 months). GCD and LCM's advantage is iOS requirement (12.0 vs 15.0). On ads, in-app purchases and device support there is nothing between them.

RedEXOS is free to download; GCD and LCM costs $3.99 up front. Neither carries in-app purchases, so what you see is what you pay.

GCD and LCM ships an update every 19 months, RedEXOS every 2 months. The most recent releases landed on November 1, 2026 and November 2, 2026 respectively.

## The numbers

| Metric | GCD and LCM | RedEXOS |
| --- | --- | --- |
| Price | $3.99 | **Free** |
| Rating | **[2.0 (2 ratings)](https://appshunter.io/ios/app/gcd-and-lcm/id603026694/reviews)** | — |
| Number of ratings | **2** | — |
| Positive reviews | 69.2% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 19 months | **Every 2 months** |
| Monetization | Paid | — |
| Size | 14 MB | 129 MB |
| Requires iOS | **12.0** | 15.0 |
| Devices | **iPhone, iPad, iPod, Mac** | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Intemodino Group s.r.o.](https://appshunter.io/developer/557849644) | [Gobierno de Canarias](https://appshunter.io/developer/896675458) |

## What reviewers say

### GCD and LCM

[App page](https://appshunter.io/ios/app/gcd-and-lcm/id603026694)

This app calculates the Greatest Common Divisor (GCD) and Least Common Multiple (LCM) for up to four numbers. It also provides prime factorization and keeps a history of calculations, which can be emailed.

**Highlights:** Calculates GCD/GCF for 2-4 numbers, Calculates LCM for 2-4 numbers, Finds prime factorization, Stores calculation history, Sends results and history via email, Supports portrait and landscape modes

**Features:** Vision Pro support

**In-app purchases:** none


### RedEXOS

[App page](https://appshunter.io/ios/app/redexos/id1446864838)

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

**In-app purchases:** none


## Frequently asked questions

### Is GCD and LCM free?

GCD and LCM costs $3.99, with no in-app purchases.

### Is RedEXOS free?

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

### Do GCD and LCM or RedEXOS have ads?

Neither GCD and LCM nor RedEXOS shows ads.

### Which is updated more often, GCD and LCM or RedEXOS?

GCD and LCM ships an update every 19 months, and RedEXOS every 2 months. Most recently, GCD and LCM was updated on November 1, 2026 and RedEXOS on November 2, 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.*