23 Equations vs Seneca
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
23 Equations
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.
- 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
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For Students: Learn by heart all of the Physics equations you need for your GCSE and IGCSE, then use them to answer questions, with help available at every step. Questions are made by “smart models” so they can show you examples and help you in other ways. They can also show you a model answer afterwards to help you improve next time. Even if you don’t have to learn the equations, you will do better if you know them by heart and can remember the correct units for each variable. Calculations are still going to make up at least 30% of the Physics exams so the better you know the equations, the better your grade is going to be. Get this app and have a virtual pack of index cards always at your fingertips. All the important information is there, including the units. Click on the Q and try practice questions to test yourself. Start a game and try and beat the clock. The questions get harder the better you do. For Teachers: Actively set the tests for your students to take. Monitor, analyse and view the answers your students give for these tests without any marking to do. Use the information to plan future lessons or setup further tests to help with revision. This is great for homework and for revision programmes leading up to exams. This is the School Room and is available through an in-app purchase. Privacy: In the free section of the app, no data is collected about you or your activity at all. The School Room section uses information provided by your teachers to allow you to log in. This means a one-way encrypted email address. You cannot be personally identified from this information.
Seneca
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.
- 1,000+ exam courses
- AI-marked questions
- Memory strength boosting
- Exam technique mastery
- Subject confidence building
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Master all the content you actually need to know for your exams, across all your subjects. Earn XP, boost your memory strength, master your exam technique with AI-marked questions & boost your confidence in all your subjects!
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Verdict
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.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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.
| Parameter | 23 Equations | Seneca |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (1 ratings) — better | 3.3 (18 ratings) |
| Positive reviews | 47.6% of reviews — better | 23.5% of reviews |
| Number of ratings | 1 | 18 — better |
| Update frequency | Every 2 weeks — better | Every 2 months |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | Free — better |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 9.3 — better | 13.0 |
| Further details — not scored | ||
| Size | 143 MB | 7 MB |
| Age rating | 4+ | 4+ |
| Developer | Nick Whitehurst | Seneca Learning Ltd. |
Customer experience
23 Equations
Seneca
Bugs and requests
23 Equations
Not enough reviews yet to summarise bugs or requests.
Seneca
Reported bugs
4 issues- Login issues with Microsoft and Google accounts
- Assignments not saving progress
- Keyboard and navigation problems
- White screen and loading errors
Requested features
4 requests- Offline mode for learning on the go
- More customization options
- Improved integration with school systems
- Better performance on older devices
In-app purchases
23 Equations
- Individual: Extra features$1.99
- School Room, 2022 Exams (S)$39.99
- School Room, 2023 Exams (S)$39.99
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- School Room, 2022 Exams (M)$69.99
- School Room, 2023 Exams (M)$74.99
- School Room, 2022 Exams (L)$99.99
- School Room, 2023 Exams (L)$99.99
Seneca
No in-app purchases








