Wi vs Koi Feeder
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Wi
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.
- 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
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Control you entire model railroad from any iOS phone or tablet in this simple to use yet feature rich app! The M.T.H. Digital Command System (DCS) is the most comprehensive and innovative model train control system available. While, at the same time, the easiest to set up and use! You’ll be running your trains in just a few minutes after installing the Wi-Fi DCS app and connecting to any one of several M.T.H. DCS track interface units. The DCS system is capable of running conventional AC or DC powered model trains utilizing track power controls as well as the ultimate experience of full featured MTH ProtoSound 2.0 or 3.0 and Atlas O® ProtoSound 3.0 locomotives. In addition, DCS is the only cross-platform model railroad control system. When cabled to a Lionel® command base DCS also runs TMCC® and Legacy® engines all within the same app, on the same track, at the same time!! No other system has this capability. The DCS app is compatible with our entry level system, the DCS Explorer for those just starting their journey into model railroading. For more advanced users, the DCS Wi-Fi Interface Unit (WIU) in combination with the Track Interface Unit (TIU) or, the all new Wi-Fi Track Interface Unit (WTIU) opens up the vast array of features available within the world of DCS. Run multiple trains simultaneously on the same track, control switches and accessories, and immerse yourself in the depth of sound and control features that is Wi-Fi DCS. Simply the best way to run YOUR railroad!!
Koi Feeder
Interact with digital koi by feeding them. Enjoy a simple, relaxing experience designed to be played with.
- Feed digital koi
- Interact with koi
- Relaxing gameplay
- Simple interface
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The application which gives food to koi. Won't you play with koi?
Screenshots
Verdict
The clearest difference is review sentiment: Koi Feeder at 100% against Wi's 36%. Koi Feeder also leads on in-app purchases (none vs 3) and iOS requirement (12.0 vs 17.0). Wi's advantage is rating (3.9 vs 3.0) and ads (none vs shown). On price and device support there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. Wi sells 3 one-off in-app purchases. Koi Feeder asks for nothing beyond the download.
Wi holds the better App Store score, 3.9 against 3.0. That said, the two scores are not equally well evidenced: Wi has 27 ratings behind it against 2, so its average is the more settled of the two. Written reviews complicate that: 36% of Wi's written reviews are positive against 100% of Koi Feeder's, so the app with the better star average is not the one people write more warmly about.
Wi ships an update every 3 months, Koi Feeder every 19 months. The most recent releases landed on October 23, 2026 and October 2, 2026 respectively.
| Parameter | Wi | Koi Feeder |
|---|---|---|
| Price | Free | Free |
| Rating | 3.9 (27 ratings) — better | 3.0 (2 ratings) |
| Positive reviews | 36.1% of reviews | 100.0% of reviews — better |
| Number of ratings | 27 — better | 2 |
| Update frequency | Every 3 months — better | Every 19 months |
| Ads | No — better | Yes |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | Ad-supported — better |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 17.0 | 12.0 — better |
| Further details — not scored | ||
| Size | 26 MB | 67 MB |
| Age rating | 4+ | 4+ |
| Developer | Mike's Train House, Inc. | kume toru |
Customer experience
Wi
Koi Feeder
In-app purchases
Wi
- Standard$4.99
- Premium Upgrade$19.99
- Premium$24.99
Koi Feeder
No in-app purchases
