Model Inventory vs Rail Model Track Calc
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Model Inventory
This app helps model railroad enthusiasts organize their collections. Track locomotives, rolling stock, structures, and accessories with custom categories, purchase details, photos, and notes. It's ideal for managing your collection and for use at train shows.
- Track locomotives, rolling stock, structures, scenery, accessories
- Create custom categories
- Log purchase date and cost
- Store photos
- Add notes
- Useful for train shows and swap meets
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Easy-to-use inventory system for tracking your model railroad locomotives, rolling stock, structures, scenery and accessories. Create custom categories, log item purchase date and cost, store photos, and make notes. Perfect to take to train shows and swap meets.
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.
Screenshots
Verdict
The clearest difference is rating: Model Inventory at 3.1 against Rail Model Track Calc's 1.0. Model Inventory also leads on ads (none vs shown) and update cadence (every 4 weeks vs every 18 months). 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.
Model Inventory holds the better App Store score, 3.1 against 1.0. Both are backed by a comparable volume of ratings — 9 and 2 respectively. Written reviews point the same way: 24% of Model Inventory's written reviews are positive against 0% of Rail Model Track Calc's.
Model Inventory ships an update every 4 weeks, Rail Model Track Calc every 18 months. The most recent releases landed on October 20, 2026 and October 24, 2026 respectively.
| Parameter | Model Inventory | Rail Model Track Calc |
|---|---|---|
| Price | Free | Free |
| Rating | 3.1 (9 ratings) — better | 1.0 (2 ratings) |
| Positive reviews | 24.4% of reviews — better | 0.0% of reviews |
| Number of ratings | 9 — better | 2 |
| Update frequency | Every 4 weeks — better | Every 18 months |
| Ads | No — better | Yes |
| In-app purchases | No | No |
| Monetization | Free — better | Ad-supported |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 9.0 — better | 15.4 |
| Further details — not scored | ||
| Size | 10 MB | 9 MB |
| Age rating | 4+ | 4+ |
| Developer | Woodland Scenics | Nobuyuki Kumakura |
Customer experience
Model Inventory
Rail Model Track Calc
In-app purchases
Model Inventory
No in-app purchases
Rail Model Track Calc
No in-app purchases
Questions
Is Model Inventory free?
Is Rail Model Track Calc free?
Which has better reviews, Model Inventory or Rail Model Track Calc?
Do Model Inventory or Rail Model Track Calc have ads?
Which is updated more often, Model Inventory or Rail Model Track Calc?
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