# 23 Equations vs MyHSDC

The clearest difference is review sentiment: 23 Equations at 48% against MyHSDC's 9%. 23 Equations also leads on update cadence (every 2 weeks vs every 2 months) and iOS requirement (9.3 vs 15.0). MyHSDC's advantage is in-app purchases (none vs 7). On price, ads and device support there is nothing between them.

Both are free to download. 23 Equations sells 7 one-off in-app purchases. MyHSDC asks for nothing beyond the download.

23 Equations ships an update every 2 weeks, MyHSDC every 2 months. The most recent releases landed on June 1, 2026 and September 14, 2026 respectively.

## The numbers

| Metric | 23 Equations | MyHSDC |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/23-equations/id1451090127/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | **47.6% of reviews** | 9.1% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 2 weeks** | Every 2 months |
| Monetization | Free with in-app purchases | **Free** |
| Size | 143 MB | 29 MB |
| Requires iOS | **9.3** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Nick Whitehurst](https://appshunter.io/developer/1451090126) | [System Live](https://appshunter.io/developer/1549836062) |

## What reviewers say

### 23 Equations

[App page](https://appshunter.io/ios/app/23-equations/id1451090127)

Master GCSE and IGCSE Physics equations with interactive learning and practice questions. The app provides instant feedback, model answers, and timed challenges to improve recall and application. Teachers can create and monitor student tests for effective revision planning.

**Highlights:** Learn physics equations by heart, Practice questions with step-by-step help, Model answers for improvement, Timed challenges and games, Teacher-created tests for students, Monitor student progress and answers, Index card-style equation reference

**Features:** macOS Compatibility

**In-app purchases (7)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Individual: Extra features | $1.99 | one-time |
| School Room, 2022 Exams (S) | $39.99 | one-time |
| School Room, 2023 Exams (S) | $39.99 | one-time |
| School Room, 2022 Exams (M) | $69.99 | one-time |
| School Room, 2023 Exams (M) | $74.99 | one-time |
| School Room, 2022 Exams (L) | $99.99 | one-time |
| School Room, 2023 Exams (L) | $99.99 | one-time |


### MyHSDC

[App page](https://appshunter.io/ios/app/myhsdc/id6547865603)

This app provides HSDC students and their parents/carers with live college information, including timetables, attendance, and assessment marks. It also sends important notifications about college events and activities directly to your device.

**Highlights:** Student timetable access, Exam timetable viewing, Attendance tracking, Absence reporting form, Assessment marks and teacher comments, Live notifications for events

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

**In-app purchases:** none


## Frequently asked questions

### Is 23 Equations free?

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

### Is MyHSDC free?

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

### Do 23 Equations or MyHSDC have ads?

Neither 23 Equations nor MyHSDC shows ads.

### Which is updated more often, 23 Equations or MyHSDC?

23 Equations ships an update every 2 weeks, and MyHSDC every 2 months. Most recently, 23 Equations was updated on June 1, 2026 and MyHSDC on September 14, 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.*