# Link 4 vs Math Devil

The clearest difference is in-app purchases: Math Devil at none against Link 4's 2. Math Devil also leads on iOS requirement (12.0 vs 17.0). Link 4's advantage is ads (none vs shown). On price, rating, ratings volume and update cadence there is nothing between them.

Both are free to download. Link 4 sells 2 one-off in-app purchases. Math Devil asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 5.0 for Link 4 against 5.0 for Math Devil. Both are backed by a comparable volume of ratings — 1 and 1 respectively.

Link 4 ships an update every 11 months, Math Devil daily. The most recent releases landed on September 7, 2026 and September 27, 2026 respectively.

## The numbers

| Metric | Link 4 | Math Devil |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (1 ratings)](https://appshunter.io/ios/app/link-4-online/id6739606990/reviews) | [5.0 (1 ratings)](https://appshunter.io/ios/app/math-devil-a-troll-level-game/id6742674755/reviews) |
| Number of ratings | 1 | 1 |
| In-app purchases | Yes | **No** |
| Ads | **No** | Yes |
| Update frequency | Every 11 months | **Daily** |
| Monetization | Free with in-app purchases | **Ad-supported** |
| Size | 12 MB | 134 MB |
| Requires iOS | 17.0 | **12.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Erfan Reed](https://appshunter.io/developer/1347463370) | [友洲 陈](https://appshunter.io/developer/1037704522) |

## What reviewers say

### Link 4

[App page](https://appshunter.io/ios/app/link-4-online/id6739606990)

Engage in a classic 4-in-a-row game with multiple modes. Play solo against AI, challenge friends locally, or compete online with players globally. Customize your experience with various settings and disc sets.

**Highlights:** Single player vs AI, Local two-player mode, Online multiplayer, Customizable settings, Multiple disc sets, No ads

**Features:** macOS Compatibility, Family Sharing, Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Disc Pack 1 | $0.99 | one-time |
| Online Game Play | $1.99 | one-time |


### Math Devil

[App page](https://appshunter.io/ios/app/math-devil-a-troll-level-game/id6742674755)

A challenging 2D platformer that combines difficult levels with math-based puzzles. Navigate traps and solve problems involving various mathematical concepts to progress. It offers a unique test of both reflexes and intellect.

**Highlights:** Challenging 2D platformer gameplay, Math puzzle integration, Multiple difficulty levels, Variety of math concepts covered, Trap-filled environments

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Link 4 free?

Link 4 is free to download, with in-app purchases available.

### Is Math Devil free?

Math Devil is free to download, with no in-app purchases.

### Which has better reviews, Link 4 or Math Devil?

Link 4 and Math Devil are both rated 5.0 out of 5 on the App Store, from 1 and 1 ratings respectively.

### Do Link 4 or Math Devil have ads?

Math Devil shows ads; Link 4 does not.

### Which is updated more often, Link 4 or Math Devil?

Link 4 ships an update every 11 months, and Math Devil daily. Most recently, Link 4 was updated on September 7, 2026 and Math Devil on September 27, 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.*