Rail Model Track Calc vs Spark Plug Reader
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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.
- 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
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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.
Spark Plug Reader
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Plug Read turns a spark plug into a diagnosis, and now it torques the replacement in correctly too. MATCHED BY EYE, NOT BY PART NUMBER Eight appearances, drawn as they come out of an engine. Tap the match and you get what it means and what to check, in the order worth checking it. INSTALL TORQUE, BY THREAD AND SEAT Pick the thread size and seat type, the head material, and get the torque range in both ft-lb and Nm, plus the hand-tight-and-turn fallback for when you do not have a torque wrench. Cross a plug wrong and you either strip the threads or leave it loose enough to blow out under compression, and the difference between right and wrong can be as little as five foot-pounds. THE PLUG IS THE CHEAPEST WINDOW INTO AN ENGINE Five minutes with a plug spanner tells you more about mixture, timing and oil control than an hour of guessing. NO PART NUMBERS, NO DATABASE Nothing here goes out of date, because it works from the plug in your hand and the thread you are installing into rather than a list of engine models. WORKS OFFLINE No account, no signal. The torque table is a published general reference cross-checked across several independent sources, not a measured specification for any specific engine. Manufacturer torque specification always takes precedence.
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Verdict
The clearest difference is in-app purchases: Rail Model Track Calc at none against Spark Plug Reader's 1. Spark Plug Reader's advantage is ads (none vs shown) and update cadence (every 2 days vs every 18 months). On price, 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
Both are free to download. Spark Plug Reader sells 1 one-off in-app purchase. Rail Model Track Calc asks for nothing beyond the download.
Rail Model Track Calc ships an update every 18 months, Spark Plug Reader every 2 days. Both last shipped on October 6, 2026.
| Parameter | Rail Model Track Calc | Spark Plug Reader |
|---|---|---|
| Price | Free | Free |
| Rating | 1.0 (1 ratings) — better | — |
| Positive reviews | 0.0% of reviews | — |
| Number of ratings | 1 — better | — |
| Update frequency | Every 18 months | Every 2 days — better |
| Ads | Yes | No — better |
| In-app purchases | No — better | Yes |
| Monetization | Ad-supported | — |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 15.4 — better | 16.4 |
| Further details — not scored | ||
| Size | 9 MB | 37 MB |
| Age rating | 4+ | 4+ |
| Developer | Nobuyuki Kumakura | EVREN YUCEBAS |
In-app purchases
Rail Model Track Calc
No in-app purchases
Spark Plug Reader
- Full Version$4.99
Questions
Is Rail Model Track Calc free?
Is Spark Plug Reader free?
Do Rail Model Track Calc or Spark Plug Reader have ads?
Which is updated more often, Rail Model Track Calc or Spark Plug Reader?
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