# Fast Clock vs Trainventory

The clearest difference is review sentiment: Trainventory at 100% against Fast Clock's 25%. Trainventory also leads on rating (4.6 vs 3.8) and ratings volume (22 vs 5). Fast Clock's advantage is update cadence (every 2 days vs every 3 months) and iOS requirement (15.6 vs 18.6). On price, ads, in-app purchases and monetization model there is nothing between them.

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

Trainventory holds the better App Store score, 4.6 against 3.8. Both are backed by a comparable volume of ratings — 5 and 22 respectively. Written reviews point the same way: 25% of Fast Clock's written reviews are positive against 100% of Trainventory's.

Fast Clock ships an update every 2 days, Trainventory every 3 months. The most recent releases landed on September 20, 2026 and September 30, 2026 respectively.

## The numbers

| Metric | Fast Clock | Trainventory |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.8 (5 ratings)](https://appshunter.io/ios/app/fast-clock/id6448879724/reviews) | **[4.6 (22 ratings)](https://appshunter.io/ios/app/trainventory/id6738597502/reviews)** |
| Number of ratings | 5 | **22** |
| Positive reviews | 25.0% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 2 days** | Every 3 months |
| Monetization | Free | Free |
| Size | 5 MB | 30 MB |
| Requires iOS | **15.6** | 18.6 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Kevin Snow](https://appshunter.io/developer/305581830) | [Nicholas Eby](https://appshunter.io/developer/380053295) |

## What reviewers say

### 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


### Trainventory

[App page](https://appshunter.io/ios/app/trainventory/id6738597502)

Organize, track the value of, and create wishlists for your model train collection. Get reminders for new releases and manage your hobby efficiently.

**Highlights:** Organize train collection, Track costs and value, Create wishlists, Wishlist reminders, User-friendly design

**In-app purchases:** none


## Frequently asked questions

### Is Fast Clock free?

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

### Is Trainventory free?

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

### Which has better reviews, Fast Clock or Trainventory?

Trainventory is rated higher. Fast Clock averages 3.8 out of 5 from 5 ratings, while Trainventory averages 4.6 from 22 ratings.

### Do Fast Clock or Trainventory have ads?

Neither Fast Clock nor Trainventory shows ads.

### Which is updated more often, Fast Clock or Trainventory?

Fast Clock ships an update every 2 days, and Trainventory every 3 months. Most recently, Fast Clock was updated on September 20, 2026 and Trainventory 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.*