# Mad Func vs HelixPlot

The clearest difference is in-app purchases: HelixPlot at none against Mad Func's 1. HelixPlot also leads on iOS requirement (15.0 vs 18.0). Mad Func's advantage is update cadence (every 3 days vs fortnightly). On price, ads and device support there is nothing between them.

Both are free to download. Mad Func sells 1 in-app purchase, starting at $2.99 per 7 days. HelixPlot asks for nothing beyond the download.

Mad Func ships an update every 3 days, HelixPlot fortnightly. The most recent releases landed on October 2, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | Mad Func | HelixPlot |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/mad-func/id6747051739/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 3 days** | Fortnightly |
| Monetization | Free with in-app purchases | — |
| Size | 28 MB | 12 MB |
| Requires iOS | 18.0 | **15.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Gina De La Rosa](https://appshunter.io/developer/1315362641) | [Yonghun Kim](https://appshunter.io/developer/1851972427) |

## What reviewers say

### Mad Func

[App page](https://appshunter.io/ios/app/mad-func/id6747051739)

Learn algorithms and coding concepts through interactive, gamified challenges. Solve puzzles by arranging code blocks, debug issues, and tackle system design problems. Track your progress and prepare for interviews or strengthen your computer science fundamentals.

**Highlights:** Gamified algorithm puzzles, Interactive debugging, System design challenges, Multi-language support, Progress tracking dashboard, Weekly new challenges

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Mad Func Pro | $2.99 | per 7 days |


### HelixPlot

[App page](https://appshunter.io/ios/app/helixplot/id6757285741)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Mad Func free?

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

### Is HelixPlot free?

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

### Do Mad Func or HelixPlot have ads?

Neither Mad Func nor HelixPlot shows ads.

### Which is updated more often, Mad Func or HelixPlot?

Mad Func ships an update every 3 days, and HelixPlot fortnightly. Most recently, Mad Func was updated on October 2, 2026 and HelixPlot on October 7, 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.*