# Science Libs vs Opposite

The clearest difference is iOS requirement: Science Libs at 13.4 against Opposite's 18.0. On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. Science Libs sells 4 one-off in-app purchases and Opposite sells 10 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

Both ship on a similar rhythm, roughly every 9 days. The most recent releases landed on September 18, 2026 and October 15, 2026 respectively.

## The numbers

| Metric | Science Libs | Opposite |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/science-libs/id6748157618/reviews)** | — |
| Number of ratings | **2** | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 9 days | Every 9 days |
| Monetization | Free with in-app purchases | — |
| Size | 41 MB | 175 MB |
| Requires iOS | **13.4** | 18.0 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Aaran Solh](https://appshunter.io/developer/1731393478) | [Nadimbhai Sheikh](https://appshunter.io/developer/1896299647) |

## What reviewers say

### Science Libs

[App page](https://appshunter.io/ios/app/science-libs/id6748157618)

This app makes learning science fun for kids aged 6-12 through Mad Libs-style stories. Children fill in blanks to create hilarious tales, then read engaging articles explaining the real science. It encourages vocabulary, creativity, and curiosity in a safe, ad-free environment.

**Highlights:** Mad Libs-style science stories, Vocabulary and creativity building, Engaging science articles, Reflective questions for discussion, Kid-friendly design, Optional social sharing with parental controls, Ad-free environment

**Features:** macOS Compatibility

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Purchase all Science Libs | $2.99 | one-time |
| Workbook download | $2.99 | one-time |
| Category Purchase | $4.99 | one-time |
| Purchase Four Categories | $9.99 | one-time |


### Opposite

[App page](https://appshunter.io/ios/app/opposite-match/id6766526576)

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weather & Nature | $0.99 | one-time |
| Body & Health | $0.99 | one-time |
| Actions & Activities | $0.99 | one-time |
| Safety Rules | $0.99 | one-time |
| Direction Positions | $0.99 | one-time |
| Technology & Objects | $0.99 | one-time |
| Money & Shopping | $0.99 | one-time |
| Travel & Transportation | $0.99 | one-time |
| Social Behavior | $0.99 | one-time |
| All in one | $6.99 | one-time |


## Frequently asked questions

### Is Science Libs free?

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

### Is Opposite free?

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

### Do Science Libs or Opposite have ads?

Neither Science Libs nor Opposite shows ads.

### Which is updated more often, Science Libs or Opposite?

Science Libs ships an update every 9 days, and Opposite every 9 days. Most recently, Science Libs was updated on September 18, 2026 and Opposite on October 15, 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.*