# 23 Equations vs Seneca

The clearest difference is rating: 23 Equations at 5.0 against Seneca's 3.3. 23 Equations also leads on review sentiment (48% vs 24%) and update cadence (every 2 weeks vs every 2 months). Seneca's advantage is in-app purchases (none vs 7) and ratings volume (18 vs 1). 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. Seneca asks for nothing beyond the download.

23 Equations holds the better App Store score, 5.0 against 3.3. That said, the two scores are not equally well evidenced: Seneca has 18 ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 48% of 23 Equations's written reviews are positive against 24% of Seneca's.

23 Equations ships an update every 2 weeks, Seneca every 2 months. The most recent releases landed on September 26, 2026 and October 14, 2026 respectively.

## The numbers

| Metric | 23 Equations | Seneca |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/23-equations/id1451090127/reviews)** | [3.3 (18 ratings)](https://appshunter.io/ios/app/seneca/id1631302657/reviews) |
| Number of ratings | 1 | **18** |
| Positive reviews | **47.6% of reviews** | 23.5% 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 | 7 MB |
| Requires iOS | **9.3** | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Nick Whitehurst](https://appshunter.io/developer/1451090126) | [Seneca Learning Ltd.](https://appshunter.io/developer/1631302659) |

## 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 |


### Seneca

[App page](https://appshunter.io/ios/app/seneca/id1631302657)

Access over 1,000 courses for KS2, KS3, GCSE, and A Level exams. Improve memory, master exam techniques with AI-marked questions, and build confidence across all subjects.

**Highlights:** 1,000+ exam courses, AI-marked questions, Memory strength boosting, Exam technique mastery, Subject confidence building

**Features:** Vision Pro support

**In-app purchases:** none

**What reviewers like**

- 🚀 Efficient learning experience
- 👍 Engaging and interactive
- 💡 Helpful for exam preparation
- 👍 Useful for various subjects

**What reviewers complain about**

- 🐛 Frequent crashes and glitches
- 🔋 Drains battery quickly
- 🤔 Confusing user interface
- 😕 Doesn't work as expected

**Reported bugs**

- Login issues with Microsoft and Google accounts
- Assignments not saving progress
- Keyboard and navigation problems
- White screen and loading errors

**Requested features**

- Offline mode for learning on the go
- More customization options
- Improved integration with school systems
- Better performance on older devices


## Frequently asked questions

### Is 23 Equations free?

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

### Is Seneca free?

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

### Which has better reviews, 23 Equations or Seneca?

23 Equations is rated higher. 23 Equations averages 5.0 out of 5 from 1 ratings, while Seneca averages 3.3 from 18 ratings.

### Do 23 Equations or Seneca have ads?

Neither 23 Equations nor Seneca shows ads.

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

23 Equations ships an update every 2 weeks, and Seneca every 2 months. Most recently, 23 Equations was updated on September 26, 2026 and Seneca on October 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.*