Blunami vs Rail Model Calc
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Blunami
Control locomotives equipped with a specific DCC decoder using your mobile device. This application allows for seamless operation of your model trains.
- Locomotive control
- DCC decoder compatibility
- SoundTraxx Blunami support
- Mobile operation
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The Blunami train control app by BlueRail Trains let's you control any locomotive equipped with a SoundTraxx Blunami DCC decoder.
Rail Model Calc
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Overview This is a calculator app that includes calculation functions necessary when playing with railroad model. How to use After launching the app,the first screen that appears is the Home screen, which also serves as a menu. Swipe and tap the menu on the Home screen to transition to various calculation modes. You can use various calculation modes to perform calculations necessary for railway model track length and railway model production. This App offer the following calculation modes. •Home mode Home is available simple calculations. Set F1-F10 memory on this screen. •Normal mode It is a normal calculator. •Straight mode This mode calculates horizontal and vertical lengths when laying a straight rail diagonally. •Curve mode This mode calculates the vertical, horizontal, and diagonal lengths when laying a curve rail. •S-Curve mode This mode calculates the vertical, horizontal, and diagonal lengths when laying a s-curve rail. •Scale X/Y mode This mode calculates the scale. •Inch to MM mode This mode converts yards and inches to millimeters. For details on how to use it, there is a manual on "?" button. Disclaimer This calculator is for the railroad modeling hobby. The calculation results is the numerical value which be calculated by the developer. It may be different from the numerical value by model manufacturer. In particular, commercially available railroad model rails allow for dimensional errors. Therefore, the calculation results do not necessarily represent what the track layout cannot or can be done. This application is subject to change without notice. The developer assumes no responsibility for any loss or claims by third parties which may arise from the use of this application.
Screenshots
Verdict
The clearest difference is ads: Blunami at none against Rail Model Calc's shown. Blunami also leads on update cadence (fortnightly vs every 14 months) and iOS requirement (12.2 vs 15.4). On price, in-app purchases 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. Neither carries in-app purchases, so what you see is what you pay.
Blunami ships an update fortnightly, Rail Model Calc every 14 months. The most recent releases landed on September 9, 2026 and September 13, 2026 respectively.
| Parameter | Blunami | Rail Model Calc |
|---|---|---|
| Price | Free | Free |
| Rating | 4.7 (9 ratings) — better | — |
| Positive reviews | 100.0% of reviews | — |
| Number of ratings | 9 — better | — |
| Update frequency | Fortnightly — better | Every 14 months |
| Ads | No — better | Yes |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 12.2 — better | 15.4 |
| Further details — not scored | ||
| Size | 46 MB | 13 MB |
| Age rating | 4+ | 4+ |
| Developer | BlueRail Trains | Nobuyuki Kumakura |
In-app purchases
Blunami
No in-app purchases
Rail Model Calc
No in-app purchases









