# bClk vs Greatest Common Factor

The clearest difference is price: bClk at Free against Greatest Common Factor's $0.99. bClk also leads on update cadence (monthly vs every 38 months) and ratings volume (4 vs 1). Greatest Common Factor's advantage is rating (5.0 vs 4.0). On ads, in-app purchases, monetization model and device support there is nothing between them.

bClk is free to download; Greatest Common Factor costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Greatest Common Factor holds the better App Store score, 5.0 against 4.0. Both are backed by a comparable volume of ratings — 4 and 1 respectively.

bClk ships an update monthly, Greatest Common Factor every 38 months. The most recent releases landed on October 10, 2026 and September 30, 2026 respectively.

## The numbers

| Metric | bClk | Greatest Common Factor |
| --- | --- | --- |
| Price | **Free** | $0.99 |
| Rating | [4.0 (4 ratings)](https://appshunter.io/ios/app/bclk/id1496472095/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/greatest-common-factor/id1573121817/reviews)** |
| Number of ratings | **4** | 1 |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Monthly** | Every 38 months |
| Monetization | Paid | Paid |
| Size | 0 MB | 1 MB |
| Requires iOS | **13.2** | 14.1 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Sean Brennan](https://appshunter.io/developer/898026482) | [H Valeur](https://appshunter.io/developer/621824042) |

## What reviewers say

### bClk

[App page](https://appshunter.io/ios/app/bclk/id1496472095)

This customizable night clock offers a vibrant color palette and adjustable brightness, perfect for use in low-light conditions. It includes features like displaying a second time zone and a unique swipe gesture for flashlight functionality. The app is designed to stay on while plugged in, with intelligent power management when unplugged.

**Highlights:** Customizable colors and brightness, 12/24 hour format with PM indicator, Display of a second time zone, Swipe gesture for flashlight mode, Orientation-dependent controls, Auto-lock management for continuous display

**Features:** Vision Pro support

**In-app purchases:** none


### 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


## Frequently asked questions

### Is bClk free?

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

### Is Greatest Common Factor free?

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

### Which has better reviews, bClk or Greatest Common Factor?

Greatest Common Factor is rated higher. bClk averages 4.0 out of 5 from 4 ratings, while Greatest Common Factor averages 5.0 from 1 ratings.

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

Neither bClk nor Greatest Common Factor shows ads.

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

bClk ships an update monthly, and Greatest Common Factor every 38 months. Most recently, bClk was updated on October 10, 2026 and Greatest Common Factor on September 30, 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.*