Comparison

Rail Model Calc vs Trainventory

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Rail Model Calc

Features
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Overview This is a calculator app that includes calculation functions necessary when playing with railroad model. How to use After launching the app,the first screen that appears is the Home screen, which also serves as a menu. Swipe and tap the menu on the Home screen to transition to various calculation modes. You can use various calculation modes to perform calculations necessary for railway model track length and railway model production. This App offer the following calculation modes. •Home mode Home is available simple calculations. Set F1-F10 memory on this screen. •Normal mode It is a normal calculator. •Straight mode This mode calculates horizontal and vertical lengths when laying a straight rail diagonally. •Curve mode This mode calculates the vertical, horizontal, and diagonal lengths when laying a curve rail. •S-Curve mode This mode calculates the vertical, horizontal, and diagonal lengths when laying a s-curve rail. •Scale X/Y mode This mode calculates the scale. •Inch to MM mode This mode converts yards and inches to millimeters. For details on how to use it, there is a manual on "?" button. 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

Trainventory

Organize, track the value of, and create wishlists for your model train collection. Get reminders for new releases and manage your hobby efficiently.

Highlights
  • Organize train collection
  • Track costs and value
  • Create wishlists
  • Wishlist reminders
  • User-friendly design
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Trainventory: Organize, Track, and Dream Big with Your Model Train Collection Whether you're a lifelong model train enthusiast or just starting your collection, Trainventory is the essential app to keep everything on track. Effortlessly organize your trains, track their value, and build your dream wishlist – all in one place. Key Features: - Organize Your Collection: Easily catalog your locomotives, carriages, and accessories with detailed entries for model type, brand, and condition. - Track Costs and Value: Keep an eye on how much you’ve invested and monitor the value of your collection over time. - Create Your Wishlist: Never forget that must-have model again – build a wishlist of trains you’re dreaming of adding to your collection. - Get Reminded: Never miss out on a presale or release date with wish list reminders Why Trainventory? • User-friendly design built specifically for model train enthusiasts. • Keep your collection organized anytime, anywhere. • Perfect for collectors of all experience levels. All aboard for the most efficient way to manage your model train hobby. Download Trainventory today and let your collection shine! Start tracking, start organizing, and keep your model train passion on the right track with Trainventory.

Screenshots

Rail Model Calc4 screens
Trainventory4 screens

Verdict

The call

The clearest difference is ads: Trainventory at none against Rail Model Calc's shown. Trainventory also leads on update cadence (every 4 months vs every 14 months). Rail Model Calc's advantage is iOS requirement (15.4 vs 18.6). 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.

UpkeepUpdate frequency

Rail Model Calc ships an update every 14 months, Trainventory every 4 months. The most recent releases landed on September 13, 2026 and September 11, 2026 respectively.

Scorecard3 real differences · 7 level
Rail Model Calc versus Trainventory: the parameters behind the verdict, then further details
ParameterRail Model CalcTrainventory
PriceFreeFree
Rating4.6 (20 ratings) — better
Positive reviews100.0% of reviews
Number of ratings20 — better
Update frequencyEvery 14 monthsEvery 4 months — better
AdsYesNo — better
In-app purchasesNoNo
MonetizationFree
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS15.4 — better18.6
Further details — not scored
Size13 MB29 MB
Age rating4+4+
DeveloperNobuyuki KumakuraNicholas Eby

In-app purchases

None

Rail Model Calc

No in-app purchases

None

Trainventory

No in-app purchases

Questions

Is Rail Model Calc free?
Rail Model Calc is free to download, with no in-app purchases.
Is Trainventory free?
Trainventory is free to download, with no in-app purchases.
Do Rail Model Calc or Trainventory have ads?
Rail Model Calc shows ads; Trainventory does not.
Which is updated more often, Rail Model Calc or Trainventory?
Rail Model Calc ships an update every 14 months, and Trainventory every 4 months. Most recently, Rail Model Calc was updated on September 13, 2026 and Trainventory on September 11, 2026.

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