# TrainDesign vs Adiabatic Equation Calculator

The clearest difference is review sentiment: Adiabatic Equation Calculator at 100% against TrainDesign's 33%. Adiabatic Equation Calculator also leads on device support (3 vs 1) and iOS requirement (13.0 vs 26.0). TrainDesign's advantage is price ($1.99 vs $7.99) and update cadence (every 4 months vs every 19 months). On ads and in-app purchases there is nothing between them.

TrainDesign costs $1.99 and Adiabatic Equation Calculator $7.99 up front. Neither carries in-app purchases, so what you see is what you pay.

TrainDesign ships an update every 4 months, Adiabatic Equation Calculator every 19 months. The most recent releases landed on October 21, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | TrainDesign | Adiabatic Equation Calculator |
| --- | --- | --- |
| Price | **$1.99** | $7.99 |
| Rating | **[2.3 (15 ratings)](https://appshunter.io/ios/app/traindesign/id820553356/reviews)** | — |
| Number of ratings | **15** | — |
| Positive reviews | 33.3% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 4 months** | Every 19 months |
| Monetization | **Free** | Paid |
| Size | 16 MB | 2 MB |
| Requires iOS | 26.0 | **13.0** |
| Devices | iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Kind of Blue](https://appshunter.io/developer/456377317) | [Pro Certs Software Ltd](https://appshunter.io/developer/444429696) |

## What reviewers say

### TrainDesign

[App page](https://appshunter.io/ios/app/traindesign/id820553356)

Design and plan your model railroad tracks with ease. This app allows you to create custom layouts, modify track segments, and adjust curves to your specifications. Unleash your creativity and build intricate routes with intuitive touch controls.

**Highlights:** Plan model railroad tracks, Create custom track lines, Modify track segments (orient, stretch, shrink), Adjust curve width, angle, and radius, Determine track altitude, Intuitive touch controls

**Features:** macOS Compatibility

**In-app purchases:** none

**What reviewers like**

- 💰 Great value for the price
- 👍 Intuitive and easy to use (initially)
- 💡 Customizable track designs
- ✅ Useful for planning layouts
- 🌍 Supports various gauges/scales and manufacturers

**What reviewers complain about**

- 🐛 Frequent bugs and glitches
- ❌ Unstable and crashes often
- 🚫 Editor not working properly
- 🪲 Track pieces not connecting/aligning
- 🔧 Difficult to rotate/move track pieces

**Reported bugs**

- App locks up after selecting first track
- Saving changes to existing layouts results in original disappearing
- Cannot move selected track
- Rotate icon greys out after one rotation
- App crashes on load

**Requested features**

- Add more track libraries (e.g., Rokuhan Z, Hornby, Lionel Fastrack, Realtrax, Fleishmann profi ho)
- Improve track connection and alignment
- Fix rotation and movement issues for track pieces
- Add a 'save as' function for layouts
- Include inch/feet measurement options


### Adiabatic Equation Calculator

[App page](https://appshunter.io/ios/app/adiabatic-equation-calculator/id1511222749)

Calculates minimum circuit protective conductor and earth conductor sizes using the adiabatic equation. Input voltage, Zs value, protective device, conductor type, and material to find the minimum CSA in mm².

**Highlights:** Calculate minimum CPC and earth conductor sizes, Uses adiabatic equation formula, Input voltage and Zs value, Select protective device and rating, Select conductor type and material, Provides results in mm²

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is TrainDesign free?

TrainDesign costs $1.99, with no in-app purchases.

### Is Adiabatic Equation Calculator free?

Adiabatic Equation Calculator costs $7.99, with no in-app purchases.

### Do TrainDesign or Adiabatic Equation Calculator have ads?

Neither TrainDesign nor Adiabatic Equation Calculator shows ads.

### Which is updated more often, TrainDesign or Adiabatic Equation Calculator?

TrainDesign ships an update every 4 months, and Adiabatic Equation Calculator every 19 months. Most recently, TrainDesign was updated on October 21, 2026 and Adiabatic Equation Calculator on October 25, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*