# wriggles vs Train Drill

The clearest difference is update cadence: Train Drill at every 2 months against wriggles's every 8 months. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. wriggles sells 1 one-off in-app purchase and Train Drill sells 2 in-app purchases, starting at $0.99 per month. Whichever you choose, the download price is not the number that matters.

wriggles ships an update every 8 months, Train Drill every 2 months. The most recent releases landed on October 24, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | wriggles | Train Drill |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/wriggles/id1465699468/reviews)** | — |
| Number of ratings | **2** | — |
| Positive reviews | 50.0% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 8 months | **Every 2 months** |
| Monetization | Free with in-app purchases | — |
| Size | 112 MB | 34 MB |
| Requires iOS | **15.0** | 15.1 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [TAKURO IMAGAWA](https://appshunter.io/developer/1465469370) | [Kuromoji LLC](https://appshunter.io/developer/6772408096) |

## What reviewers say

### wriggles

[App page](https://appshunter.io/ios/app/wriggles/id1465699468)

A charming interactive toy app where a caterpillar hatches and wriggles on screen. Feed it to help it grow into a butterfly, and explore its reactions to touch. Designed for young children to freely play and stimulate their curiosity.

**Highlights:** Interactive caterpillar growth simulation, Transform into a butterfly, Touch-based reactions, Free play and exploration, Stimulates curiosity

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Add content | $1.99 | one-time |


### Train Drill

[App page](https://appshunter.io/ios/app/train-drill/id6778407957)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Mini | $0.99 | per month |
| Unlimited | $1.99 | per month |


## Frequently asked questions

### Is wriggles free?

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

### Is Train Drill free?

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

### Do wriggles or Train Drill have ads?

Neither wriggles nor Train Drill shows ads.

### Which is updated more often, wriggles or Train Drill?

wriggles ships an update every 8 months, and Train Drill every 2 months. Most recently, wriggles was updated on October 24, 2026 and Train Drill 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.*