# Twin Science vs BOOKR Next

The clearest difference is rating: BOOKR Next at 5.0 against Twin Science's 4.5. BOOKR Next also leads on review sentiment (100% vs 67%) and iOS requirement (13.0 vs 15.6). Twin Science's advantage is ratings volume (76 vs 7) and update cadence (every 2 months vs every 3 months). On price, ads, in-app purchases and monetization model there is nothing between them.

Both are free to download. Twin Science sells 10 in-app purchases, starting at $2.49 per month and BOOKR Next sells 2 in-app purchases, starting at $7.99 per month. Whichever you choose, the download price is not the number that matters.

BOOKR Next holds the better App Store score, 5.0 against 4.5. That said, the two scores are not equally well evidenced: Twin Science has 76 ratings behind it against 7, so its average is the more settled of the two. Written reviews point the same way: 67% of Twin Science's written reviews are positive against 100% of BOOKR Next's.

Twin Science ships an update every 2 months, BOOKR Next every 3 months. The most recent releases landed on August 8, 2026 and September 7, 2026 respectively.

## The numbers

| Metric | Twin Science | BOOKR Next |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.5 (76 ratings)](https://appshunter.io/ios/app/twin-science-stem-learning/id1479559635/reviews) | **[5.0 (7 ratings)](https://appshunter.io/ios/app/bookr-next/id6746642644/reviews)** |
| Number of ratings | **76** | 7 |
| Positive reviews | 66.7% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 3 months |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 99 MB | 198 MB |
| Requires iOS | 15.6 | **13.0** |
| Devices | iPhone, iPad, iPod | **iPhone, iPad, iPod, Mac** |
| Age rating | 4+ | 4+ |
| Developer | [TWIN YAZILIM MUHENDISLIK SANAYI VE TICARET ANONIM SIRKETI](https://appshunter.io/developer/1447423866) | [BOOKR Digital](https://appshunter.io/developer/938096934) |

## 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 |


### BOOKR Next

[App page](https://appshunter.io/ios/app/bookr-next/id6746642644)

This app makes learning English engaging for young learners through interactive stories, games, and AI-powered tools. It focuses on reading, speaking, and comprehension without traditional lessons, offering a creative and confidence-building experience.

**Highlights:** 550+ diverse books, Gamified learning with badges and challenges, AI-powered vocabulary, pronunciation, and comprehension support, Offline story downloads, Aligned with CEFR levels, Focus on creativity and critical thinking

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly subscription | $7.99 | per month |
| Yearly Subscription | $69.99 | per year |


## Frequently asked questions

### Is Twin Science free?

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

### Is BOOKR Next free?

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

### Which has better reviews, Twin Science or BOOKR Next?

BOOKR Next is rated higher. Twin Science averages 4.5 out of 5 from 76 ratings, while BOOKR Next averages 5.0 from 7 ratings.

### Do Twin Science or BOOKR Next have ads?

Neither Twin Science nor BOOKR Next shows ads.

### Which is updated more often, Twin Science or BOOKR Next?

Twin Science ships an update every 2 months, and BOOKR Next every 3 months. Most recently, Twin Science was updated on August 8, 2026 and BOOKR Next on September 7, 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.*