Comparison

Rail Model Calc vs VVVFスピードメーター

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

VVVFスピードメーター

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VVVFスピードメーターは、移動中の速度を計測しながら、鉄道ファンにはおなじみのVVVFインバータ音を楽しめるアプリです。 京急電鉄1000系の加速音を再現し、リアルな走行体験を提供します。 主な機能: VVVFインバータ加速音 加速時にVVVFドレミファインバータの心地よい加速音を再生。 京急電鉄1000系のリアルなサウンドを楽しめます。 GPS速度計測機能 移動中の速度をGPSを利用して計測し、リアルタイムで表示。 電車や自動車での移動時に使用可能。 京急電鉄路線シミュレーション 京急電鉄の路線情報をもとに移動距離を計算。 移動をシミュレーションし、実際の駅間の移動を体験可能。 実績解除機能 設定された目的地まで移動すると実績が解除。 実績解除で次の路線が選択可能になり、より多くの区間を楽しめます。 注意事項: 運転中は画面を凝視しないようご注意ください。 表示される速度はあくまで目安です。 自動車運転時は法定速度を超えないよう、安全運転を心がけてください。 対象ユーザー: 鉄道ファン、特にVVVFインバータ音が好きな方。 京急電鉄に興味がある方。 速度計測アプリをお探しの方。 このアプリで、いつでもどこでも京急電鉄のVVVFインバータ音を楽しみましょう!

Screenshots

Rail Model Calc4 screens
VVVFスピードメーター3 screens

Verdict

The call

The clearest difference is ads: VVVFスピードメーター at none against Rail Model Calc's shown. VVVFスピードメーター also leads on update cadence (every 4 months vs every 14 months). On price, in-app purchases, 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. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Rail Model Calc ships an update every 14 months, VVVFスピードメーター every 4 months. The most recent releases landed on October 1, 2026 and October 14, 2026 respectively.

Scorecard2 real differences · 4 level
Rail Model Calc versus VVVFスピードメーター: the parameters behind the verdict, then further details
ParameterRail Model CalcVVVFスピードメーター
PriceFreeFree
Update frequencyEvery 14 monthsEvery 4 months — better
AdsYesNo — better
In-app purchasesNoNo
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.415.0 — better
Further details — not scored
Size13 MB125 MB
Age rating4+17+
DeveloperNobuyuki KumakuraKENJI TAKETO

In-app purchases

None

Rail Model Calc

No in-app purchases

None

VVVFスピードメーター

No in-app purchases

Questions

Is Rail Model Calc free?
Rail Model Calc is free to download, with no in-app purchases.
Is VVVFスピードメーター free?
VVVFスピードメーター is free to download, with no in-app purchases.
Do Rail Model Calc or VVVFスピードメーター have ads?
Rail Model Calc shows ads; VVVFスピードメーター does not.
Which is updated more often, Rail Model Calc or VVVFスピードメーター?
Rail Model Calc ships an update every 14 months, and VVVFスピードメーター every 4 months. Most recently, Rail Model Calc was updated on October 1, 2026 and VVVFスピードメーター on October 14, 2026.

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