# What's Hiding? vs Math Duel

The clearest difference is rating: Math Duel at 4.5 against What's Hiding?'s 2.0. Math Duel also leads on review sentiment (64% vs 33%) and update cadence (every 6 weeks vs every 10 months). What's Hiding?'s advantage is in-app purchases (none vs 1) and iOS requirement (8.1 vs 15.0). On price, ads, monetization model and device support there is nothing between them.

Both are free to download. Math Duel sells 1 one-off in-app purchase. What's Hiding? asks for nothing beyond the download.

Math Duel holds the better App Store score, 4.5 against 2.0. That said, the two scores are not equally well evidenced: Math Duel has 237 ratings behind it against 3, so its average is the more settled of the two. Written reviews point the same way: 33% of What's Hiding?'s written reviews are positive against 64% of Math Duel's.

What's Hiding? ships an update every 10 months, Math Duel every 6 weeks. The most recent releases landed on November 1, 2026 and November 13, 2026 respectively.

## The numbers

| Metric | What's Hiding? | Math Duel |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [2.0 (3 ratings)](https://appshunter.io/ios/app/whats-hiding/id416444482/reviews) | **[4.5 (237 ratings)](https://appshunter.io/ios/app/math-duel-multiplayer-battle/id495077699/reviews)** |
| Number of ratings | 3 | **237** |
| Positive reviews | 33.3% of reviews | **64.4% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 10 months | **Every 6 weeks** |
| Monetization | Free | Free |
| Size | 37 MB | 86 MB |
| Requires iOS | **8.1** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Classroom Focused Software](https://appshunter.io/developer/406741679) | [Ellie's Games, LLC](https://appshunter.io/developer/355986115) |

## What reviewers say

### What's Hiding?

[App page](https://appshunter.io/ios/app/whats-hiding/id416444482)

This educational app helps young learners practice basic addition and subtraction. It uses visual aids like discs presented in frames, with some hidden to test number sense. The app supports numbers up to 20 and offers options for counting or subtilizing.

**Highlights:** Addition and subtraction practice, Visual disc counting, Numbers 1-5, 1-10, or 1-20 support, 5-frame and 10-frame formats, Counting or subtilizing options, iPad specific features

**Features:** macOS Compatibility

**In-app purchases:** none


### Math Duel

[App page](https://appshunter.io/ios/app/math-duel-multiplayer-battle/id495077699)

Engage in a fun, competitive math game for two players on a single device. Improve basic math skills and strategic thinking with customizable equations and modes. Ideal for classrooms or home practice, it encourages collaboration and personalized learning.

**Highlights:** Two-player split-screen mode, Single player practice, Customizable equations, Teacher-adjustable settings, Basic math skill improvement, Strategic thinking development

**Features:** macOS Compatibility, Family Sharing, iPhone Duo support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlock All Features | $4.99 | one-time |

**What reviewers like**

- 👍 Great for practicing math facts
- 👨‍👩‍👧‍👦 Good for family/classroom competition
- 💡 Customizable difficulty levels
- 🧠 Effective for mental math skills
- 🎮 Fun and engaging gameplay

**What reviewers complain about**

- 🐛 Frequent crashing issues
- 📉 Multiplication and division not working well for some
- 🔢 Increments of 10 instead of 1 for numbers
- 🚫 No option to focus on specific timestables
- ❌ Inability to change operations/differentiation as advertised

**Reported bugs**

- App keeps crashing
- Multiplication doesn't work well
- Division problems cannot be solved due to lack of decimal key
- Settings button resets score
- App freezes timer in single player when settings is pressed

**Requested features**

- Ability to focus on specific timestables
- Option to change operations and differentiation
- Support for older iPads
- Return to increments of 1 for numbers
- Add decimal point for division


## Frequently asked questions

### Is What's Hiding? free?

What's Hiding? is free to download, with no in-app purchases.

### Is Math Duel free?

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

### Which has better reviews, What's Hiding? or Math Duel?

Math Duel is rated higher. What's Hiding? averages 2.0 out of 5 from 3 ratings, while Math Duel averages 4.5 from 237 ratings.

### Do What's Hiding? or Math Duel have ads?

Neither What's Hiding? nor Math Duel shows ads.

### Which is updated more often, What's Hiding? or Math Duel?

What's Hiding? ships an update every 10 months, and Math Duel every 6 weeks. Most recently, What's Hiding? was updated on November 1, 2026 and Math Duel on November 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.*