Comparison

Rail Model Track Calc vs Starlight Clock

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

Starlight Clock

Features
Read full description

This is a digital and analog clock application with a starry sky motif. The constellation changes every hour. You can also set events in which locomotives appear at 10, 15, 20, 30, and 60 minute intervals. Sometimes shooting stars also stream. ***** The time text, analog clock, and constellations can be moved with the fingers. The analog clock and constellations can be zoomed in and out with two fingers. Seconds can also be displayed. Touching the time character switches to setting mode. The date and time can be changed to various formats by touching it in the setting mode. The display can be switched between 12-hour and 24-hour formats. Screen rotation in portrait and landscape orientation is also supported. By pressing buttons such as "2X" and "3X," the font size can be adjusted in steps. You can choose from 24 different constellations. The order of the constellations can be set to change randomly as well as in a predetermined order. The time signal can be set to one of 79 different tones.

Screenshots

Rail Model Track Calc4 screens
Starlight Clock4 screens

Verdict

The call

The clearest difference is in-app purchases: Rail Model Track Calc at none against Starlight Clock's 1. Starlight Clock's advantage is update cadence (every 3 months vs every 18 months). On price, ads, device support and iOS requirement 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. Starlight Clock sells 1 one-off in-app purchase. Rail Model Track Calc asks for nothing beyond the download.

UpkeepUpdate frequency

Rail Model Track Calc ships an update every 18 months, Starlight Clock every 3 months. Both last shipped on October 24, 2026.

Scorecard2 real differences · 8 level
Rail Model Track Calc versus Starlight Clock: the parameters behind the verdict, then further details
ParameterRail Model Track CalcStarlight Clock
PriceFreeFree
Rating1.0 (2 ratings) — better—
Positive reviews0.0% of reviews—
Number of ratings2 — better—
Update frequencyEvery 18 monthsEvery 3 months — better
AdsYesYes
In-app purchasesNo — betterYes
MonetizationAd-supported—
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.414.0 — better
Further details — not scored
Size9 MB14 MB
Age rating4+4+
DeveloperNobuyuki KumakuraMihoko Araki

In-app purchases

None

Rail Model Track Calc

No in-app purchases

1 purchases

Starlight Clock

One-time1
  • Starlight Clock with no ads$2.99

Questions

Is Rail Model Track Calc free?
Rail Model Track Calc is free to download, with no in-app purchases.
Is Starlight Clock free?
Starlight Clock is free to download, with in-app purchases available.
Do Rail Model Track Calc or Starlight Clock have ads?
Both Rail Model Track Calc and Starlight Clock show ads.
Which is updated more often, Rail Model Track Calc or Starlight Clock?
Rail Model Track Calc ships an update every 18 months, and Starlight Clock every 3 months. Most recently, Rail Model Track Calc was updated on October 24, 2026 and Starlight Clock on October 24, 2026.

Other comparisons