# WiThrottle vs Fast Clock

The clearest difference is review sentiment: WiThrottle at 83% against Fast Clock's 25%. WiThrottle also leads on rating (4.3 vs 3.8) and ratings volume (40 vs 5). Fast Clock's advantage is price (Free vs $9.99) and update cadence (every 2 days vs every 2 months). On ads, in-app purchases and device support there is nothing between them.

Fast Clock is free to download; WiThrottle costs $9.99 up front. Neither carries in-app purchases, so what you see is what you pay.

WiThrottle holds the better App Store score, 4.3 against 3.8. That said, the two scores are not equally well evidenced: WiThrottle has 40 ratings behind it against 5, so its average is the more settled of the two. Written reviews point the same way: 83% of WiThrottle's written reviews are positive against 25% of Fast Clock's.

WiThrottle ships an update every 2 months, Fast Clock every 2 days. The most recent releases landed on October 10, 2026 and September 20, 2026 respectively.

## The numbers

| Metric | WiThrottle | Fast Clock |
| --- | --- | --- |
| Price | $9.99 | **Free** |
| Rating | **[4.3 (40 ratings)](https://appshunter.io/ios/app/withrottle/id344172578/reviews)** | [3.8 (5 ratings)](https://appshunter.io/ios/app/fast-clock/id6448879724/reviews) |
| Number of ratings | **40** | 5 |
| Positive reviews | **83.1% of reviews** | 25.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 2 days** |
| Monetization | Paid | **Free** |
| Size | 6 MB | 5 MB |
| Requires iOS | **11.0** | 15.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Beth Hoffman](https://appshunter.io/developer/344172581) | [Kevin Snow](https://appshunter.io/developer/305581830) |

## What reviewers say

### WiThrottle

[App page](https://appshunter.io/ios/app/withrottle/id344172578)

Control your model railroad trains wirelessly using your mobile device. This app connects to JMRI software or specific hardware modules for comprehensive throttle, address, and function management.

**Highlights:** Wireless throttle control, JMRI integration, Function controls F0-F68, Control routes & turnouts, Import roster & function labels, Acquire & dispatch addresses

**Features:** Vision Pro support

**In-app purchases:** none

**What reviewers like**

- 👍 Easy to use interface
- 🚀 Works great with JMRI
- 📱 Controls trains wirelessly
- 💡 Excellent value for money
- 🔧 Great customer support

**What reviewers complain about**

- 🐛 Connection drops when backgrounded
- 🐛 JMRI connection issues
- 🐛 Some features not working
- 🐛 UI could be improved
- 🐛 Limited on iPhone vs iPad

**Reported bugs**

- Power ON/OFF broken
- Horn gets stuck on with DCC-EX
- Minor glitchy unresponsive throttle slider
- App would not connect to JMRI 5.2
- Connection to JMRI server drops when app goes to background

**Requested features**

- Support for DCC-EX
- Night mode and dark mode
- Turnout/Points control in main UI
- Routes support with MRC Wi-Fi module
- Customizable features like Android app


### 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 WiThrottle free?

WiThrottle costs $9.99, with no in-app purchases.

### Is Fast Clock free?

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

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

WiThrottle is rated higher. WiThrottle averages 4.3 out of 5 from 40 ratings, while Fast Clock averages 3.8 from 5 ratings.

### Do WiThrottle or Fast Clock have ads?

Neither WiThrottle nor Fast Clock shows ads.

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

WiThrottle ships an update every 2 months, and Fast Clock every 2 days. Most recently, WiThrottle was updated on October 10, 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.*