# Sigma Academy vs JoeKey

The clearest difference is in-app purchases: Sigma Academy at none against JoeKey's 1. Sigma Academy also leads on iOS requirement (13.0 vs 15.6). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. JoeKey sells 1 one-off in-app purchase. Sigma Academy asks for nothing beyond the download.

Sigma Academy ships an update monthly, JoeKey every 5 weeks. The most recent releases landed on October 30, 2026 and October 12, 2026 respectively.

## The numbers

| Metric | Sigma Academy | JoeKey |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/sigma-academy/id1611602150/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Monthly** | Every 5 weeks |
| Monetization | Free | — |
| Size | 72 MB | 50 MB |
| Requires iOS | **13.0** | 15.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Khaled Mohamed](https://appshunter.io/developer/1489806911) | [Joseph Ibrahim](https://appshunter.io/developer/1710427354) |

## What reviewers say

### Sigma Academy

[App page](https://appshunter.io/ios/app/sigma-academy/id1611602150)

This educational app allows students, parents, and teachers to track grades, exams, and attendance. It facilitates question-solving with automatic assessment and provides a platform for students to ask teachers questions, with answers shared for all. Teachers can also share news and upload educational resources like PDFs and past exams.

**Highlights:** View grades, exams, and attendance, Solve questions with automatic correction, Ask teachers questions and share answers, Receive news and announcements, Upload and access educational resources (PDFs, past exams), View teacher profiles and contact information

**Features:** macOS Compatibility

**In-app purchases:** none


### JoeKey

[App page](https://appshunter.io/ios/app/joekey/id6470925062)

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| C# Course | $0.99 | one-time |


## Frequently asked questions

### Is Sigma Academy free?

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

### Is JoeKey free?

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

### Do Sigma Academy or JoeKey have ads?

Neither Sigma Academy nor JoeKey shows ads.

### Which is updated more often, Sigma Academy or JoeKey?

Sigma Academy ships an update monthly, and JoeKey every 5 weeks. Most recently, Sigma Academy was updated on October 30, 2026 and JoeKey on October 12, 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.*