# 23 Equations vs MyUSP

The clearest difference is in-app purchases: MyUSP at none against 23 Equations's 7. 23 Equations's advantage is update cadence (every 2 weeks vs every 4 months) and iOS requirement (9.3 vs 12.3.0). 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. MyUSP asks for nothing beyond the download.

23 Equations ships an update every 2 weeks, MyUSP every 4 months. The most recent releases landed on June 1, 2026 and September 21, 2026 respectively.

## The numbers

| Metric | 23 Equations | MyUSP |
| --- | --- | --- |
| 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 | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 2 weeks** | Every 4 months |
| Monetization | Free with in-app purchases | — |
| Size | 143 MB | 36 MB |
| Requires iOS | **9.3** | 12.3.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Nick Whitehurst](https://appshunter.io/developer/1451090126) | [Collabco](https://appshunter.io/developer/844114043) |

## 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 |


### MyUSP

[App page](https://appshunter.io/ios/app/myusp/id6455986805)

**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 MyUSP free?

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

### Do 23 Equations or MyUSP have ads?

Neither 23 Equations nor MyUSP shows ads.

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

23 Equations ships an update every 2 weeks, and MyUSP every 4 months. Most recently, 23 Equations was updated on June 1, 2026 and MyUSP on September 21, 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.*