# Wi vs Heritage Units

The clearest difference is ads: Wi at none against Heritage Units's shown. Heritage Units's advantage is update cadence (every 10 days vs every 3 months) and review sentiment (58% vs 36%). On price, in-app purchases, monetization model and device support there is nothing between them.

Both are free to download. Wi sells 3 one-off in-app purchases and Heritage Units sells 2 in-app purchases, starting at $0.99 per year. Whichever you choose, the download price is not the number that matters.

Heritage Units holds the better App Store score, 4.1 against 3.9. That said, the two scores are not equally well evidenced: Heritage Units has 259 ratings behind it against 27, so its average is the more settled of the two. Written reviews point the same way: 36% of Wi's written reviews are positive against 58% of Heritage Units's.

Wi ships an update every 3 months, Heritage Units every 10 days. The most recent releases landed on November 1, 2026 and November 6, 2026 respectively.

## The numbers

| Metric | Wi | Heritage Units |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.9 (27 ratings)](https://appshunter.io/ios/app/wi-fi-dcs/id988168329/reviews) | **[4.1 (259 ratings)](https://appshunter.io/ios/app/heritage-units/id1117504088/reviews)** |
| Number of ratings | 27 | **259** |
| Positive reviews | 36.1% of reviews | **58.1% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 3 months | **Every 10 days** |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 26 MB | 122 MB |
| Requires iOS | 17.0 | **15.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 17+ |
| Developer | [Mike's Train House, Inc.](https://appshunter.io/developer/988168328) | [Brian Minnich](https://appshunter.io/developer/1117504087) |

## What reviewers say

### Wi

[App page](https://appshunter.io/ios/app/wi-fi-dcs/id988168329)

Control your model railroad with an iOS device. This app offers comprehensive and innovative control for M.T.H. Digital Command System (DCS) and can also manage TMCC® and Legacy® engines. It's designed for ease of use, allowing you to run multiple trains and control accessories.

**Highlights:** Comprehensive model railroad control, Run MTH ProtoSound 2.0/3.0 locomotives, Control Atlas O® ProtoSound 3.0, Cross-platform control (TMCC®, Legacy®), Run multiple trains simultaneously, Control switches and accessories, Immersive sound and control features

**Features:** macOS Compatibility

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Standard | $4.99 | one-time |
| Premium Upgrade | $19.99 | one-time |
| Premium | $24.99 | one-time |


### Heritage Units

[App page](https://appshunter.io/ios/app/heritage-units/id1117504088)

This app allows users to track and report special interest locomotives from major US railroads. View reported units on a map within a 200-mile radius and contribute new sightings directly from your device.

**Highlights:** Track heritage units, Report new locomotive locations, View locomotives on maps, Search within 200 miles, Support for major railroads

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Ad Free | $0.99 | per year |
| Premium Membership | $5.99 | per year |

**What reviewers like**

- 🎯 Excellent tool for tracking heritage units and special locomotives
- 📍 Real-time location reporting from community users
- 👍 User-friendly interface and intuitive navigation
- 📸 Ability to upload photos of locomotives
- 🚀 Responsive developer support and regular updates

**What reviewers complain about**

- 🐛 Frequent app crashes and freezing
- 🔓 Persistent login/logout issues
- ⚠️ Confusing error messages without clear explanations
- 📵 Limited photo upload capacity for free users
- 🚫 Arbitrary account suspensions and bans

**Reported bugs**

- App crashes when refreshing or loading reports
- Persistent 'You've reached your limit for spots' error that lasts weeks or months
- Login credentials rejected despite correct password/username
- Automatic logout after 1-2 months of inactivity
- Premium subscription purchases not recognized by app

**Requested features**

- Dark mode and light mode toggle
- Report timestamp visibility to distinguish old vs new reports
- Edit and delete buttons for submitted reports
- Increase daily/monthly report submission limits
- Ability to favorite or star specific locomotives


## Frequently asked questions

### Is Wi free?

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

### Is Heritage Units free?

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

### Which has better reviews, Wi or Heritage Units?

Heritage Units is rated higher. Wi averages 3.9 out of 5 from 27 ratings, while Heritage Units averages 4.1 from 259 ratings.

### Do Wi or Heritage Units have ads?

Heritage Units shows ads; Wi does not.

### Which is updated more often, Wi or Heritage Units?

Wi ships an update every 3 months, and Heritage Units every 10 days. Most recently, Wi was updated on November 1, 2026 and Heritage Units on November 6, 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.*