# HackIllinois vs Zetamac Arithmetic Practice

HackIllinois and Zetamac Arithmetic Practice both sit at 4.7 stars, but that hides the real split: 100% of HackIllinois's written reviews are positive against 82% of Zetamac Arithmetic Practice's. HackIllinois also leads on iOS requirement (15.1 vs 17.5). On price, rating, ratings volume and update cadence there is nothing between them.

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

On the App Store both sit at effectively the same score — 4.7 for HackIllinois against 4.7 for Zetamac Arithmetic Practice. Both are backed by a comparable volume of ratings — 32 and 18 respectively. Written reviews are what separate them: 100% of HackIllinois's written reviews are positive against 82% of Zetamac Arithmetic Practice's.

Both ship on a similar rhythm, roughly daily. The most recent releases landed on June 5, 2026 and September 27, 2026 respectively.

## The numbers

| Metric | HackIllinois | Zetamac Arithmetic Practice |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.7 (32 ratings)](https://appshunter.io/ios/app/hackillinois/id1451755268/reviews) | [4.7 (18 ratings)](https://appshunter.io/ios/app/zetamac-arithmetic-practice/id6737153617/reviews) |
| Number of ratings | **32** | 18 |
| Positive reviews | **100.0% of reviews** | 82.4% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Daily | Daily |
| Monetization | Free | Free |
| Size | 46 MB | 1 MB |
| Requires iOS | **15.1** | 17.5 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [ACM UIUC](https://appshunter.io/developer/1200368579) | [Joseph Ma](https://appshunter.io/developer/1774979062) |

## What reviewers say

### HackIllinois

[App page](https://appshunter.io/ios/app/hackillinois/id1451755268)

This app enhances the hackathon experience by providing event schedules, point-earning opportunities through QR scans and duels, and a shop for redeeming prizes. Users can track their progress, view rankings, and manage check-ins for food and events.

**Highlights:** Event schedule and details, Point system via QR scans and duels, Prize redemption in Point Shop, Personal progress and rank tracking, Event check-in functionality, Countdown timer for hacking

**In-app purchases:** none


### Zetamac Arithmetic Practice

[App page](https://appshunter.io/ios/app/zetamac-arithmetic-practice/id6737153617)

This app offers mental math practice tailored for quantitative finance professionals. It focuses on improving calculation speed and accuracy for complex numerical problems.

**Highlights:** Mental math practice, Quantitative finance focus, Calculation speed improvement, Accuracy enhancement, Numerical problem solving

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

**In-app purchases:** none


## Frequently asked questions

### Is HackIllinois free?

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

### Is Zetamac Arithmetic Practice free?

Zetamac Arithmetic Practice is free to download, with no in-app purchases.

### Which has better reviews, HackIllinois or Zetamac Arithmetic Practice?

HackIllinois and Zetamac Arithmetic Practice are both rated 4.7 out of 5 on the App Store, from 32 and 18 ratings respectively.

### Do HackIllinois or Zetamac Arithmetic Practice have ads?

Neither HackIllinois nor Zetamac Arithmetic Practice shows ads.

### Which is updated more often, HackIllinois or Zetamac Arithmetic Practice?

HackIllinois ships an update daily, and Zetamac Arithmetic Practice daily. Most recently, HackIllinois was updated on June 5, 2026 and Zetamac Arithmetic Practice 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.*