# X is for Xavier vs WWF Explore!

The clearest difference is review sentiment: X is for Xavier at 100% against WWF Explore!'s 27%. X is for Xavier also leads on in-app purchases (none vs 3) and rating (4.5 vs 4.1). WWF Explore!'s advantage is update cadence (every 6 weeks vs every 61 months) and ratings volume (22 vs 2). On price, ads and monetization model there is nothing between them.

Both are free to download. WWF Explore! sells 3 one-off in-app purchases. X is for Xavier asks for nothing beyond the download.

X is for Xavier holds the better App Store score, 4.5 against 4.1. That said, the two scores are not equally well evidenced: WWF Explore! has 22 ratings behind it against 2, so its average is the more settled of the two. Written reviews point the same way: 100% of X is for Xavier's written reviews are positive against 27% of WWF Explore!'s.

X is for Xavier ships an update every 61 months, WWF Explore! every 6 weeks. The most recent releases landed on September 29, 2026 and October 14, 2026 respectively.

## The numbers

| Metric | X is for Xavier | WWF Explore! |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.5 (2 ratings)](https://appshunter.io/ios/app/x-is-for-xavier/id496959081/reviews)** | [4.1 (22 ratings)](https://appshunter.io/ios/app/wwf-explore/id978107217/reviews) |
| Number of ratings | 2 | **22** |
| Positive reviews | **100.0% of reviews** | 26.7% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 61 months | **Every 6 weeks** |
| Monetization | Free | Free |
| Size | 127 MB | 554 MB |
| Requires iOS | 9.0 | **6.0** |
| Devices | **iPhone, iPad, iPod** | iPad |
| Age rating | 4+ | 4+ |
| Developer | [Rabbit Hill](https://appshunter.io/developer/397384355) | [World Wildlife Fund](https://appshunter.io/developer/581920334) |

## What reviewers say

### X is for Xavier

[App page](https://appshunter.io/ios/app/x-is-for-xavier/id496959081)

An interactive old-fashioned book app designed to teach and delight young children. It features riddles, rhymes, music, animal sounds, and hidden treasures to engage children and parents. Children can interact with animals to reveal verses and discover classical music.

**Highlights:** Interactive animal characters, Riddles and rhymes, Original orchestrated music, Animal sound effects, Hidden treasures, Alphabet learning

**Features:** macOS Compatibility

**In-app purchases:** none


### WWF Explore!

[App page](https://appshunter.io/ios/app/wwf-explore/id978107217)

Embark on interactive expeditions to ecologically diverse regions, learning about endangered species and their habitats through engaging stories and animations. Discover unique animals with detailed journal entries and collect memories in a keepsake photo gallery.

**Highlights:** Interactive expeditions, Endangered animal profiles, Detailed species information, Keepsake photo gallery, Educational stories and animations

**Features:** macOS Compatibility

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Arctic Expedition | $0.99 | one-time |
| Himalayas Expedition | $0.99 | one-time |
| Africa Expedition | $0.99 | one-time |


## Frequently asked questions

### Is X is for Xavier free?

X is for Xavier is free to download, with no in-app purchases.

### Is WWF Explore! free?

WWF Explore! is free to download, with in-app purchases available.

### Which has better reviews, X is for Xavier or WWF Explore!?

X is for Xavier is rated higher. X is for Xavier averages 4.5 out of 5 from 2 ratings, while WWF Explore! averages 4.1 from 22 ratings.

### Do X is for Xavier or WWF Explore! have ads?

Neither X is for Xavier nor WWF Explore! shows ads.

### Which is updated more often, X is for Xavier or WWF Explore!?

X is for Xavier ships an update every 61 months, and WWF Explore! every 6 weeks. Most recently, X is for Xavier was updated on September 29, 2026 and WWF Explore! on October 14, 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.*