# Twin Science vs Okumanya

The clearest difference is rating: Twin Science at 4.5 against Okumanya's 3.3. Twin Science also leads on ratings volume (76 vs 4). Okumanya's advantage is in-app purchases (none vs 10) and update cadence (weekly vs every 2 months). On price, ads, device support and iOS requirement there is nothing between them.

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

Twin Science holds the better App Store score, 4.5 against 3.3. That said, the two scores are not equally well evidenced: Twin Science has 76 ratings behind it against 4, so its average is the more settled of the two.

Twin Science ships an update every 2 months, Okumanya weekly. The most recent releases landed on August 8, 2026 and September 13, 2026 respectively.

## The numbers

| Metric | Twin Science | Okumanya |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.5 (76 ratings)](https://appshunter.io/ios/app/twin-science-stem-learning/id1479559635/reviews)** | [3.3 (4 ratings)](https://appshunter.io/ios/app/okumanya/id6753008094/reviews) |
| Number of ratings | **76** | 4 |
| Positive reviews | 66.7% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 2 months | **Weekly** |
| Monetization | Free with in-app purchases | **Free** |
| Size | 99 MB | 32 MB |
| Requires iOS | 15.6 | 15.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [TWIN YAZILIM MUHENDISLIK SANAYI VE TICARET ANONIM SIRKETI](https://appshunter.io/developer/1447423866) | [EDUMIND EGITIM YAYINCILIK DANISMANLIK VE TICARET ANONIM SIRKETI](https://appshunter.io/developer/1748295685) |

## 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 |


### Okumanya

[App page](https://appshunter.io/ios/app/okumanya/id6753008094)

An intelligent library app designed to improve reading habits with fun, educational, and interactive content. It offers a safe, ad-free environment with a wide collection of books for different age groups.

**Highlights:** AI-based smart library, Improve reading habits, Fun and educational content, Interactive stories, Wide book collection, Safe and ad-free environment

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

**In-app purchases:** none


## Frequently asked questions

### Is Twin Science free?

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

### Is Okumanya free?

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

### Which has better reviews, Twin Science or Okumanya?

Twin Science is rated higher. Twin Science averages 4.5 out of 5 from 76 ratings, while Okumanya averages 3.3 from 4 ratings.

### Do Twin Science or Okumanya have ads?

Neither Twin Science nor Okumanya shows ads.

### Which is updated more often, Twin Science or Okumanya?

Twin Science ships an update every 2 months, and Okumanya weekly. Most recently, Twin Science was updated on August 8, 2026 and Okumanya on September 13, 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.*