# Math Duel vs Number Line Math K2

The clearest difference is rating: Math Duel at 4.5 against Number Line Math K2's 1.0. Math Duel also leads on update cadence (every 6 weeks vs every 12 months) and ratings volume (236 vs 2). Number Line Math K2's advantage is in-app purchases (none vs 1) and iOS requirement (10.0 vs 15.0). On price, ads and monetization model there is nothing between them.

Both are free to download. Math Duel sells 1 one-off in-app purchase. Number Line Math K2 asks for nothing beyond the download.

Math Duel holds the better App Store score, 4.5 against 1.0. That said, the two scores are not equally well evidenced: Math Duel has 236 ratings behind it against 2, so its average is the more settled of the two.

Math Duel ships an update every 6 weeks, Number Line Math K2 every 12 months. The most recent releases landed on November 8, 2026 and November 1, 2026 respectively.

## The numbers

| Metric | Math Duel | Number Line Math K2 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.5 (236 ratings)](https://appshunter.io/ios/app/math-duel-multiplayer-battle/id495077699/reviews)** | [1.0 (2 ratings)](https://appshunter.io/ios/app/number-line-math-k2/id500559584/reviews) |
| Number of ratings | **236** | 2 |
| Positive reviews | 64.4% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 6 weeks** | Every 12 months |
| Monetization | Free | Free |
| Size | 86 MB | 34 MB |
| Requires iOS | 15.0 | **10.0** |
| Devices | **iPhone, iPad, iPod** | iPad |
| Age rating | 4+ | 4+ |
| Developer | [Ellie's Games, LLC](https://appshunter.io/developer/355986115) | [Classroom Focused Software](https://appshunter.io/developer/406741679) |

## What reviewers say

### 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


### Number Line Math K2

[App page](https://appshunter.io/ios/app/number-line-math-k2/id500559584)

This app helps young learners practice addition, subtraction, and comparison skills up to 20 using an interactive number line. Users can customize problems to focus on different unknown quantities and specific math facts.

**Highlights:** Addition and subtraction up to 20, More Than/Less Than comparisons, Interactive number line tool, Customizable unknown quantities, Selectable math facts to practice

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Math Duel free?

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

### Is Number Line Math K2 free?

Number Line Math K2 is free to download, with no in-app purchases.

### Which has better reviews, Math Duel or Number Line Math K2?

Math Duel is rated higher. Math Duel averages 4.5 out of 5 from 236 ratings, while Number Line Math K2 averages 1.0 from 2 ratings.

### Do Math Duel or Number Line Math K2 have ads?

Neither Math Duel nor Number Line Math K2 shows ads.

### Which is updated more often, Math Duel or Number Line Math K2?

Math Duel ships an update every 6 weeks, and Number Line Math K2 every 12 months. Most recently, Math Duel was updated on November 8, 2026 and Number Line Math K2 on November 1, 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.*