# Twin Science vs OKUDIO

The clearest difference is in-app purchases: OKUDIO at none against Twin Science's 10. OKUDIO also leads on iOS requirement (13.0 vs 15.6). Twin Science's advantage is device support. On price there is nothing between them.

Both are free to download. Twin Science sells 10 in-app purchases, starting at $2.49 per month. OKUDIO asks for nothing beyond the download.

## The numbers

| Metric | Twin Science | OKUDIO |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.5 (76 ratings)](https://appshunter.io/ios/app/twin-science-stem-learning/id1479559635/reviews)** | — |
| Number of ratings | **76** | — |
| Positive reviews | 66.7% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | — |
| Update frequency | Every 2 months | — |
| Monetization | Free with in-app purchases | — |
| Size | 99 MB | 50 MB |
| Requires iOS | 15.6 | **13.0** |
| Devices | **iPhone, iPad, iPod** | — |
| Age rating | 4+ | 4+ |
| Developer | [TWIN YAZILIM MUHENDISLIK SANAYI VE TICARET ANONIM SIRKETI](https://appshunter.io/developer/1447423866) | [ARMADA YAYINCILIK BILISIM VE EGITIM HIZMETLERI LIMITED SIRKETI](https://appshunter.io/developer/1735672132) |

## What reviewers say

### Twin Science

[App page](https://appshunter.io/ios/app/twin-science-stem-learning/id1479559635)

This app provides sustainability and environmental education for children aged 7-12 through gamified STEM+A content. It features interactive videos, hands-on projects, trivia, and AI-based skill reports for parents and educators.

**Highlights:** SDG-based sustainability content, Gamified learning experience, AI-based monthly skill reports, Interactive discovery videos, Hands-on DIY projects, STEM+A trivia games, Ad-free and moderated environment

**Features:** macOS Compatibility

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Membership | $2.49 | per month |
| Premium Membership | $2.99 | per month |
| Premium Membership | $3.49 | per month |
| Monthly Premium Plan | $7.99 | per month |
| Premium Membership | $23.99 | per year |
| Premium Membership | $27.99 | per year |
| Premium Membership | $29.99 | per year |
| 6 Months Education Pack | $44.99 | per 6 months |
| Yearly Premium Plan | $79.99 | per year |
| 1 Year Education Pack | $79.99 | per year |


### OKUDIO

[App page](https://appshunter.io/ios/app/okudio/id6479349626)

**In-app purchases:** none


## Frequently asked questions

### Is Twin Science free?

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

### Is OKUDIO free?

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

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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.*