# CodeHorizon vs HackUDC OS

The clearest difference is iOS requirement: CodeHorizon at 7.0 against HackUDC OS's 16.4. On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

CodeHorizon ships an update every 3 weeks, HackUDC OS every 2 weeks. The most recent releases landed on October 1, 2026 and October 3, 2026 respectively.

## The numbers

| Metric | CodeHorizon | HackUDC OS |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/codehorizon/id925056167/reviews)** | — |
| Number of ratings | **2** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Every 2 weeks** |
| Monetization | Free | — |
| Size | 1 MB | 48 MB |
| Requires iOS | **7.0** | 16.4 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Chintan Ghate](https://appshunter.io/developer/925056166) | [GPUL](https://appshunter.io/developer/1874751084) |

## What reviewers say

### CodeHorizon

[App page](https://appshunter.io/ios/app/codehorizon/id925056167)

Stay updated on algorithm contests across multiple coding platforms. Get timely notifications for upcoming and live events, with customizable alert timings. Access contest information and registration pages directly within the app.

**Highlights:** Algorithm contest notifications, Support for multiple coding sites, Customizable notification timings, View contest information pages, Direct access to registration pages

**Features:** macOS Compatibility

**In-app purchases:** none


### HackUDC OS

[App page](https://appshunter.io/ios/app/hackudc-os/id6790912214)

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

**In-app purchases:** none


## Frequently asked questions

### Is CodeHorizon free?

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

### Is HackUDC OS free?

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

### Do CodeHorizon or HackUDC OS have ads?

Neither CodeHorizon nor HackUDC OS shows ads.

### Which is updated more often, CodeHorizon or HackUDC OS?

CodeHorizon ships an update every 3 weeks, and HackUDC OS every 2 weeks. Most recently, CodeHorizon was updated on October 1, 2026 and HackUDC OS on October 3, 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.*