# Greatest Common Factor vs PixShrink

The clearest difference is price: PixShrink at Free against Greatest Common Factor's $0.99. PixShrink also leads on update cadence (every 3 weeks vs every 38 months). Greatest Common Factor's advantage is in-app purchases (none vs 3) and ads (none vs shown).

PixShrink is free to download; Greatest Common Factor costs $0.99 up front. PixShrink sells 3 in-app purchases, starting at $1.99 per month. Greatest Common Factor asks for nothing beyond the download.

Greatest Common Factor ships an update every 38 months, PixShrink every 3 weeks. The most recent releases landed on October 16, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | Greatest Common Factor | PixShrink |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/greatest-common-factor/id1573121817/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 38 months | **Every 3 weeks** |
| Monetization | Paid | — |
| Size | 1 MB | 10 MB |
| Requires iOS | **14.1** | 17.6 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [H Valeur](https://appshunter.io/developer/621824042) | [兴俊 温](https://appshunter.io/developer/1861494269) |

## What reviewers say

### Greatest Common Factor

[App page](https://appshunter.io/ios/app/greatest-common-factor/id1573121817)

This app helps users find the factors of numbers, calculate the Greatest Common Factor (GCF) for two or more numbers, and simplify fractions. It's a useful tool for understanding number theory concepts and performing fraction simplification.

**Highlights:** Find factors of a number, Calculate GCF of two or more numbers, Simplify fractions, Understand number theory concepts, Fraction simplification tool

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

**In-app purchases:** none


### PixShrink

[App page](https://appshunter.io/ios/app/pixshrink/id6756671969)

**Features:** macOS Compatibility

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| PixShrink Pro Monthly | $1.99 | per month |
| PixShrink Pro Annual | $9.99 | per year |
| PixShrink Pro Lifetime | $29.99 | one-time |


## Frequently asked questions

### Is Greatest Common Factor free?

Greatest Common Factor costs $0.99, with no in-app purchases.

### Is PixShrink free?

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

### Do Greatest Common Factor or PixShrink have ads?

PixShrink shows ads; Greatest Common Factor does not.

### Which is updated more often, Greatest Common Factor or PixShrink?

Greatest Common Factor ships an update every 38 months, and PixShrink every 3 weeks. Most recently, Greatest Common Factor was updated on October 16, 2026 and PixShrink on October 7, 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.*