Comparison

Rail Model Track Calc vs TrainNavigator

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

TrainNavigator

Features
Read full description

Simple DCCex controller for model railroad -multiple throttles to control locos -turnouts controller defined in DCCex setup -layout editor with turnout control -auto-discovery of your DCCex server The app needs only access to local network to connect to DCCex permission. Terms of use: https://trainnavigator.fisharea.eu/terms.html

Screenshots

Rail Model Track Calc4 screens
TrainNavigator3 screens

Verdict

The call

The clearest difference is in-app purchases: Rail Model Track Calc at none against TrainNavigator's 1. TrainNavigator's advantage is ads (none vs shown) and update cadence (every 4 days vs every 18 months). 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. TrainNavigator sells 1 in-app purchase, starting at $7.99 per year. Rail Model Track Calc asks for nothing beyond the download.

UpkeepUpdate frequency

Rail Model Track Calc ships an update every 18 months, TrainNavigator every 4 days. The most recent releases landed on November 3, 2026 and October 3, 2026 respectively.

Scorecard4 real differences · 6 level
Rail Model Track Calc versus TrainNavigator: the parameters behind the verdict, then further details
ParameterRail Model Track CalcTrainNavigator
PriceFreeFree
Rating1.0 (2 ratings) — better—
Positive reviews0.0% of reviews—
Number of ratings2 — better—
Update frequencyEvery 18 monthsEvery 4 days — better
AdsYesNo — better
In-app purchasesNo — betterYes
MonetizationAd-supported—
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.412.0 — better
Further details — not scored
Size9 MB28 MB
Age rating4+4+
DeveloperNobuyuki KumakuraMichal Kajaba

In-app purchases

None

Rail Model Track Calc

No in-app purchases

1 purchases

TrainNavigator

Subscriptions1
  • TrainNavigator Premium$7.991 Year

Questions

Is Rail Model Track Calc free?
Rail Model Track Calc is free to download, with no in-app purchases.
Is TrainNavigator free?
TrainNavigator is free to download, with in-app purchases available.
Do Rail Model Track Calc or TrainNavigator have ads?
Rail Model Track Calc shows ads; TrainNavigator does not.
Which is updated more often, Rail Model Track Calc or TrainNavigator?
Rail Model Track Calc ships an update every 18 months, and TrainNavigator every 4 days. Most recently, Rail Model Track Calc was updated on November 3, 2026 and TrainNavigator on October 3, 2026.

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