# bk Group Mobile App vs Fast Clock

The clearest difference is update cadence: Fast Clock at every 2 days against bk Group Mobile App's every 6 months. On price, ads, in-app purchases and device support there is nothing between them.

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

bk Group Mobile App ships an update every 6 months, Fast Clock every 2 days. The most recent releases landed on September 7, 2026 and September 20, 2026 respectively.

## The numbers

| Metric | bk Group Mobile App | Fast Clock |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[3.8 (5 ratings)](https://appshunter.io/ios/app/fast-clock/id6448879724/reviews)** |
| Number of ratings | — | **5** |
| Positive reviews | — | 25.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 6 months | **Every 2 days** |
| Monetization | — | Free |
| Size | 138 MB | 5 MB |
| Requires iOS | **14.2** | 15.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [bk Group](https://appshunter.io/developer/1348741816) | [Kevin Snow](https://appshunter.io/developer/305581830) |

## What reviewers say

### bk Group Mobile App

[App page](https://appshunter.io/ios/app/bk-group-mobile-app/id1348741817)

**Features:** macOS Compatibility

**In-app purchases:** none


### Fast Clock

[App page](https://appshunter.io/ios/app/fast-clock/id6448879724)

This application simulates a fast clock for model railroads. It allows for custom logos and maps, and can synchronize with external systems like JMRI or use real-time.

**Highlights:** Model railroad fast clock simulation, Custom logo support, Custom map integration, JMRI time synchronization, Real-time clock option

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

**In-app purchases:** none


## Frequently asked questions

### Is bk Group Mobile App free?

bk Group Mobile App is free to download, with no in-app purchases.

### Is Fast Clock free?

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

### Do bk Group Mobile App or Fast Clock have ads?

Neither bk Group Mobile App nor Fast Clock shows ads.

### Which is updated more often, bk Group Mobile App or Fast Clock?

bk Group Mobile App ships an update every 6 months, and Fast Clock every 2 days. Most recently, bk Group Mobile App was updated on September 7, 2026 and Fast Clock on September 20, 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.*