Comparison

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.

Head to head
About

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.

Highlights
  • 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
Features
Read full description

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.

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.

Screenshots

Model Inventory4 screens
Rail Model Track Calc4 screens

Verdict

The call

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

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

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.

UpkeepUpdate frequency

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.

Scorecard7 real differences · 3 level
Model Inventory versus Rail Model Track Calc: the parameters behind the verdict, then further details
ParameterModel InventoryRail Model Track Calc
PriceFreeFree
Rating3.1 (9 ratings) — better1.0 (2 ratings)
Positive reviews24.4% of reviews — better0.0% of reviews
Number of ratings9 — better2
Update frequencyEvery 4 weeks — betterEvery 18 months
AdsNo — betterYes
In-app purchasesNoNo
MonetizationFree — betterAd-supported
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS9.0 — better15.4
Further details — not scored
Size10 MB9 MB
Age rating4+4+
DeveloperWoodland ScenicsNobuyuki Kumakura

Customer experience

Model Inventory

All ratings9 ratings
Positive44.4%
Neutral22.2%
Negative33.3%
Written reviews41 reviews
Positive24.4%
Neutral14.6%
Negative61.0%

Rail Model Track Calc

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

In-app purchases

None

Model Inventory

No in-app purchases

None

Rail Model Track Calc

No in-app purchases

Questions

Is Model Inventory free?
Model Inventory is free to download, with no in-app purchases.
Is Rail Model Track Calc free?
Rail Model Track Calc is free to download, with no in-app purchases.
Which has better reviews, Model Inventory or Rail Model Track Calc?
Model Inventory is rated higher. Model Inventory averages 3.1 out of 5 from 9 ratings, while Rail Model Track Calc averages 1.0 from 2 ratings.
Do Model Inventory or Rail Model Track Calc have ads?
Rail Model Track Calc shows ads; Model Inventory does not.
Which is updated more often, Model Inventory or Rail Model Track Calc?
Model Inventory ships an update every 4 weeks, and Rail Model Track Calc every 18 months. Most recently, Model Inventory was updated on October 20, 2026 and Rail Model Track Calc on October 24, 2026.

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