# GCD and GCF Simple Calculator vs Prime Rush

The clearest difference is in-app purchases: GCD and GCF Simple Calculator at none against Prime Rush's 1. GCD and GCF Simple Calculator also leads on device support (3 vs 1) and iOS requirement (15 vs 17). Prime Rush's advantage is update cadence (every 3 weeks vs every 3 months). On price and ads there is nothing between them.

Both are free to download. Prime Rush sells 1 one-off in-app purchase. GCD and GCF Simple Calculator asks for nothing beyond the download.

GCD and GCF Simple Calculator ships an update every 3 months, Prime Rush every 3 weeks. Both last shipped on September 10, 2026.

## The numbers

| Metric | GCD and GCF Simple Calculator | Prime Rush |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.5 (2 ratings)](https://appshunter.io/ios/app/gcd-and-gcf-simple-calculator/id1492483841/reviews)** | — |
| Number of ratings | **2** | — |
| In-app purchases | **No** | Yes |
| Ads | Yes | Yes |
| Update frequency | Every 3 months | **Every 3 weeks** |
| Monetization | Ad-supported | — |
| Size | 5 MB | 21 MB |
| Requires iOS | **15** | 17 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Josue Cuginguilua](https://appshunter.io/developer/1485279395) | [Ayumu Izumi](https://appshunter.io/developer/1822273057) |

## What reviewers say

### GCD and GCF Simple Calculator

[App page](https://appshunter.io/ios/app/gcd-and-gcf-simple-calculator/id1492483841)

This app provides a straightforward way to calculate the Greatest Common Factor (GCF) for multiple numbers. It offers step-by-step explanations for math problems and real-world scenarios, making it a valuable tool for students and educators. The clean design ensures a stress-free learning experience.

**Highlights:** GCF Calculator, Enter multiple numbers, Instant results, Real-world math problems, Clear explanations, Offline support for basic calculations

**Features:** macOS Compatibility

**In-app purchases:** none


### Prime Rush

[App page](https://appshunter.io/ios/app/prime-rush-math-time-attack/id6755986782)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro Plan | $1.99 | one-time |


## Frequently asked questions

### Is GCD and GCF Simple Calculator free?

GCD and GCF Simple Calculator is free to download, with no in-app purchases.

### Is Prime Rush free?

Prime Rush is free to download, with in-app purchases available.

### Do GCD and GCF Simple Calculator or Prime Rush have ads?

Both GCD and GCF Simple Calculator and Prime Rush show ads.

### Which is updated more often, GCD and GCF Simple Calculator or Prime Rush?

GCD and GCF Simple Calculator ships an update every 3 months, and Prime Rush every 3 weeks. Most recently, GCD and GCF Simple Calculator was updated on September 10, 2026 and Prime Rush on September 10, 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.*