# OTOTETSU vs PlotTwist Studio

The clearest difference is in-app purchases: OTOTETSU at none against PlotTwist Studio's 8. OTOTETSU also leads on ratings volume (19 vs 2). PlotTwist Studio's advantage is rating (5.0 vs 4.7). On price, review sentiment, ads and device support there is nothing between them.

Both are free to download. PlotTwist Studio sells 8 in-app purchases, starting at $12.99 per month. OTOTETSU asks for nothing beyond the download.

PlotTwist Studio holds the better App Store score, 5.0 against 4.7. That said, the two scores are not equally well evidenced: OTOTETSU has 19 ratings behind it against 2, so its average is the more settled of the two. Written reviews point the same way: 93% of OTOTETSU's written reviews are positive against 100% of PlotTwist Studio's.

## The numbers

| Metric | OTOTETSU | PlotTwist Studio |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.7 (19 ratings)](https://appshunter.io/ios/app/ototetsu/id1557885726/reviews) | **[5.0 (2 ratings)](https://appshunter.io/ios/app/plottwist-studio/id6760311800/reviews)** |
| Number of ratings | **19** | 2 |
| Positive reviews | 93.1% of reviews | **100.0% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 2 months | — |
| Monetization | **Free** | Free with in-app purchases |
| Size | 20 MB | 46 MB |
| Requires iOS | **15.0** | 15.1 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Hisato Takeuchi](https://appshunter.io/developer/1512764876) | [Russell Powers](https://appshunter.io/developer/1871254703) |

## What reviewers say

### OTOTETSU

[App page](https://appshunter.io/ios/app/ototetsu/id1557885726)

This app simulates the characteristic sounds of electric trains, generated by inverters controlling motor torque and speed. Users can design sounds for imaginary trains by manipulating waveforms and motor sounds.

**Highlights:** Simulates electric train acceleration/deceleration sounds, Generates waveforms from inverters, Simulates motor sounds, Design imaginary train sounds, Customize torque and rotational speed effects

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

**In-app purchases:** none


### PlotTwist Studio

[App page](https://appshunter.io/ios/app/plottwist-studio/id6760311800)

Create personalized, AI-generated story adventures for children starring themselves and their friends. Choose genres, settings, characters, and surprise twists, brought to life with professional voice narration and synchronized text highlighting. Stories can be saved offline and are COPPA-compliant with no ads.

**Highlights:** Personalized AI story generation, Child-controlled story builder, Professional AI voice narration, Synchronized text highlighting, Customizable characters and settings, Offline story saving, Multiple child profiles

**Features:** macOS Compatibility

**In-app purchases (8)**

| Purchase | Price | Billing |
| --- | --- | --- |
| PlotTwist Premium Monthly | $12.99 | per month |
| PlotTwist Premium Annual | $109.99 | per year |
| 20 Text Stories | $2.99 | one-time |
| 3 Voice Credits | $4.99 | one-time |
| 50 Text Stories | $4.99 | one-time |
| 7 Voice Credits | $9.99 | one-time |
| 30 Voice Credits | $49.99 | one-time |
| 70 voice credits | $99.99 | one-time |


## Frequently asked questions

### Is OTOTETSU free?

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

### Is PlotTwist Studio free?

PlotTwist Studio is free to download, with in-app purchases available.

### Which has better reviews, OTOTETSU or PlotTwist Studio?

PlotTwist Studio is rated higher. OTOTETSU averages 4.7 out of 5 from 19 ratings, while PlotTwist Studio averages 5.0 from 2 ratings.

### Do OTOTETSU or PlotTwist Studio have ads?

Neither OTOTETSU nor PlotTwist Studio shows ads.

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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.*