Comparison

Rail Model Track Calc vs Blunami

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Rail Model Track Calc

Easily calculate horizontal and vertical dimensions for diagonal railroad model track layouts. Input track length and angle to get precise measurements for combining different track pieces. Avoid guesswork and ensure accurate model railway construction.

Highlights
  • Calculate horizontal and vertical track lengths
  • Input track length and angle
  • Precise measurements in 0.5 mm increments
  • Error margin less than 0.5mm
  • Reset function for calculations
  • Designed for railroad modeling hobbyists
Features
Read full description

Overview This is an application that can calculate the horizontal and vertical lengths when laying out the railroad model tracks diagonally. For example, when a straight track is laid out after laying a curved track(e.g. 45° angle). Or straight tracks after laying out railroad points (e.g. 15°) etc. If you lay out the track diagonally like this, It is necessary to know the horizontal and vertical dimensions in order to combine other tracks to create a layout. But, it is troublesome to calculate the size. There is also need to rely on intuition. So please, use this application. This application you can easily calculate the dimensions of the track. How to use 1. Enter a millimeter number for the track length. 2. Select an angle. 3. The Horizontal, Difference, and Vertical, which are the calculation results, are displayed. Decimal point can be used. Calculation result As the calculation result, the horizontal length (angle 0°), horizontal difference, and vertical length are displayed in units of 0.5 mm. The error of the calculation result is less than 0.5mm Reset button The numbers and angles are reset. 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.

About

Blunami

Control locomotives equipped with a specific DCC decoder using your mobile device. This application allows for seamless operation of your model trains.

Highlights
  • Locomotive control
  • DCC decoder compatibility
  • SoundTraxx Blunami support
  • Mobile operation
Features
Read full description

The Blunami train control app by BlueRail Trains let's you control any locomotive equipped with a SoundTraxx Blunami DCC decoder.

Screenshots

Rail Model Track Calc4 screens
Blunami4 screens

Verdict

The call

The clearest difference is review sentiment: Blunami at 100% against Rail Model Track Calc's 0%. Blunami also leads on rating (4.7 vs 1.0) and ads (none vs shown). 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

CostPrice · In-app purchases · Ads · Monetization

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

ReceptionRating · Positive reviews · Number of ratings

Blunami holds the better App Store score, 4.7 against 1.0. That said, the two scores are not equally well evidenced: Blunami has 10 ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 0% of Rail Model Track Calc's written reviews are positive against 100% of Blunami's.

UpkeepUpdate frequency

Rail Model Track Calc ships an update every 18 months, Blunami every 2 weeks. The most recent releases landed on October 6, 2026 and October 12, 2026 respectively.

Scorecard7 real differences · 3 level
Rail Model Track Calc versus Blunami: the parameters behind the verdict, then further details
ParameterRail Model Track CalcBlunami
PriceFreeFree
Rating1.0 (1 ratings)4.7 (10 ratings) — better
Positive reviews0.0% of reviews100.0% of reviews — better
Number of ratings110 — better
Update frequencyEvery 18 monthsEvery 2 weeks — better
AdsYesNo — better
In-app purchasesNoNo
MonetizationAd-supportedFree — better
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.413.0 — better
Further details — not scored
Size9 MB50 MB
Age rating4+4+
DeveloperNobuyuki KumakuraBlueRail Trains

Customer experience

Rail Model Track Calc

All ratings1 ratings
Positive0.0%
Neutral0.0%
Negative100.0%
Written reviews1 reviews
Positive0.0%
Neutral0.0%
Negative100.0%

Blunami

All ratings10 ratings
Positive90.0%
Neutral10.0%
Negative0.0%
Written reviews5 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

Rail Model Track Calc

No in-app purchases

None

Blunami

No in-app purchases

Questions

Is Rail Model Track Calc free?
Rail Model Track Calc is free to download, with no in-app purchases.
Is Blunami free?
Blunami is free to download, with no in-app purchases.
Which has better reviews, Rail Model Track Calc or Blunami?
Blunami is rated higher. Rail Model Track Calc averages 1.0 out of 5 from 1 ratings, while Blunami averages 4.7 from 10 ratings.
Do Rail Model Track Calc or Blunami have ads?
Rail Model Track Calc shows ads; Blunami does not.
Which is updated more often, Rail Model Track Calc or Blunami?
Rail Model Track Calc ships an update every 18 months, and Blunami every 2 weeks. Most recently, Rail Model Track Calc was updated on October 6, 2026 and Blunami on October 12, 2026.

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