# i vs Train Throttle

The clearest difference is in-app purchases: i at none against Train Throttle's 3. i also leads on iOS requirement (10.0 vs 16.1). On price, rating, ratings volume and update cadence there is nothing between them.

Both are free to download. Train Throttle sells 3 in-app purchases, starting at $1.99 per year. i asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 5.0 for i against 5.0 for Train Throttle. Both are backed by a comparable volume of ratings — 1 and 2 respectively.

Both ship on a similar rhythm, roughly every 2 months. The most recent releases landed on October 4, 2026 and September 28, 2026 respectively.

## The numbers

| Metric | i | Train Throttle |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (1 ratings)](https://appshunter.io/ios/app/i-string/id1547563821/reviews) | [5.0 (2 ratings)](https://appshunter.io/ios/app/train-throttle/id1662181863/reviews) |
| Number of ratings | 1 | **2** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 2 months | Every 2 months |
| Monetization | **Free** | Free with in-app purchases |
| Size | 16 MB | 6 MB |
| Requires iOS | **10.0** | 16.1 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Mac |
| Age rating | 4+ | 4+ |
| Developer | [Heng Chih Huang](https://appshunter.io/developer/1063165534) | [Drew Hoffman](https://appshunter.io/developer/1662181865) |

## What reviewers say

### i

[App page](https://appshunter.io/ios/app/i-string/id1547563821)

Control two-color lamp strings with a simple, intuitive interface. Intelligently manage colorful and white lights, and customize display patterns through the app's functions.

**Highlights:** Control two-color lamp strings, Manage colorful and white lights, Remote control-like interface, Intelligent display pattern control, Simple and easy operation

**Features:** macOS Compatibility

**In-app purchases:** none


### Train Throttle

[App page](https://appshunter.io/ios/app/train-throttle/id1662181863)

Control your DCC model trains wirelessly from your Mac, iPhone, or iPad. Manage multiple engines, set turnouts, and toggle routes. A free trial offers core functionality, with a subscription unlocking advanced features.

**Highlights:** Wireless DCC train control, Control multiple engines/consists, Set turnouts and toggle routes, Free trial with core features, Full feature subscription

**Features:** Family Sharing

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Subscribe | $1.99 | per year |
| Tip a Coffee | $3.99 | one-time |
| Purchase | $12.99 | one-time |


## Frequently asked questions

### Is i free?

i is free to download, with no in-app purchases.

### Is Train Throttle free?

Train Throttle is free to download, with in-app purchases available.

### Which has better reviews, i or Train Throttle?

i and Train Throttle are both rated 5.0 out of 5 on the App Store, from 1 and 2 ratings respectively.

### Do i or Train Throttle have ads?

Neither i nor Train Throttle shows ads.

### Which is updated more often, i or Train Throttle?

i ships an update every 2 months, and Train Throttle every 2 months. Most recently, i was updated on October 4, 2026 and Train Throttle on September 28, 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.*