# 23 Equations — Learn GCSE Physics equations > Interactive tool for learning and practicing GCSE Physics equations with teacher features. (iPhone/iPad app by Nick Whitehurst.) - Source: https://appshunter.io/ios/app/23-equations/id1451090127 (this page in markdown: same URL + `.md`) - Developer: [Nick Whitehurst](https://appshunter.io/developer/1451090126) - Category: Education, Reference - Price: Free with in-app purchases - Rating: 5.00/5 from 1 App Store ratings · 21 written reviews indexed - Age rating: 4+ - Requires: iOS 9.3 · 143 MB - Released: 2019-02-04 - Data updated: 2026-06-01 - Monetization: free with in-app purchases - User reviews in markdown: https://appshunter.io/ios/app/23-equations/id1451090127/reviews.md ## What is 23 Equations? 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. ## Key features - 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 ## Pricing and in-app purchases Base price: Free. **One-time purchases** | Purchase | Price | Type | | --- | --- | --- | | School Room, 2022 Exams (M) | $69.99 | one-time | | School Room, 2022 Exams (S) | $39.99 | one-time | | School Room, 2022 Exams (L) | $99.99 | one-time | | School Room, 2023 Exams (L) | $99.99 | one-time | | School Room, 2023 Exams (M) | $74.99 | one-time | | School Room, 2023 Exams (S) | $39.99 | one-time | | Individual: Extra features | $1.99 | one-time | ## Recent user reviews (10 of 21) All indexed reviews: https://appshunter.io/ios/app/23-equations/id1451090127/reviews.md ### 5/5 — very good app *2024-09-25, version 3.3.9* This app took my academics to higher levels and helped me to achieve great marks with my class in GCSE physics ### 4/5 — Great app *2024-09-21, version 3.3.9* I absolutely love this, but the only issue is that there is no option for the word equations. I like doing them the most. Not necessary or anything but I would just like it. ### 3/5 — 23 equations *2024-06-10, version 3.3.9* I paid for premium but the revision programmes don’t load, only bring up a blank green screen. Please fix!! ### 1/5 — I love this *2024-04-15, version 3.3.9* Great app helps me revise a lot could not recommend it more. ### 5/5 — No idea why this is reviewed so badly *2024-04-07, version 3.3.9* Its so well thought through, you can switch around formulas, turn on dark mode, change difficulty, keep a log of your progress and stuff. This app looks really useful :D ### 2/5 — confusing *2023-09-25, version 3.3.9* i’m so confused ### 1/5 — rubbish *2023-07-03, version 3.3.8* makes me cry ### 1/5 — Review *2022-12-09* This is terrible I would rather eat poop ### 5/5 — Fantastic practice for GCSE students *2022-12-01, version 3.1.2* I am a physics teacher and always recommend this app to my students. I have struggled to find anything better for recalling, rearranging and using equations. Students regularly speak to me about how useful they find it and how the instant feedback really boosts their confidence. ### 1/5 — Bad *2022-11-30, version 3.1.2* It’s quite terrible ## Frequently asked questions about 23 Equations ### What is the learning methodology of 23 Equations? 23 Equations uses a combination of memorization through virtual index cards, interactive practice questions with hints, and timed challenges. It also provides model answers to help users understand how to improve their responses. ### How does 23 Equations track student progress? For teachers, the 'School Room' feature allows them to set tests and monitor student answers without manual marking. This data can be used to plan future lessons and identify areas for revision. ### Is 23 Equations suitable for offline use? The description implies that the core learning and practice features are available at your fingertips, suggesting offline functionality for the equation learning and practice sections. However, teacher-specific features might require connectivity. ### What devices is 23 Equations available on? 23 Equations is available on iPhone, iPad, and iPod devices, as indicated by the supported devices list. ### How often is 23 Equations updated? The app was last updated on September 6, 2023, with version 3.3.9. This indicates a relatively recent update, suggesting ongoing support and development. ### What is the age rating for 23 Equations? 23 Equations has an age rating of 4+, making it suitable for a wide range of users, including younger students and those new to physics concepts. ### Does 23 Equations offer certifications? The app focuses on learning and practicing equations for GCSE and IGCSE exams. It does not appear to offer formal certifications, but aims to improve exam performance. ### What are the privacy features of 23 Equations? In the free section, no user data is collected. The 'School Room' section uses encrypted email addresses for teacher logins, ensuring users cannot be personally identified. ## Version history (last 5 releases) ### 3.3.9 — 2023-09-06 V 3.3.9 06/09/2023 What’s new • Teachers can now set tests that adapt the difficulty of questions according to the performance of the student to aid progress. • Teachers can see a live view of the answers, including a new Timeline view • Ability to show animations added to questions ### 3.3.8 — 2023-06-11 V 3.3.8 11/06/2023 What’s new • Restored missing example buttons and unit keyboard in landscape orientation. ### 3.3.7 — 2023-06-08 V 3.3.7 08/06/2023 What’s new • Live Mode introduced. Teachers, set a test for your class, See answers and analysis in real-time. Great for using in the classroom. • Improved handling of long test lists ### 3.3.6 — 2023-05-22 V 3.3.6 21/05/2023 What’s new • Support for exam board dependent values for acceleration due to gravity (g) • Corrections to required to learn list for IGCSE • Various improvements to analysis views for teachers ### 3.3.5 — 2023-05-09 V 3.3.5 09/05/2023 What’s new • A fix for local name decryption not working for staff after bulk import ## Apps similar to 23 Equations | App | Rating | Price | Category | | --- | --- | --- | --- | | [ChemQuiz - AQA GCSE Chemistry](https://appshunter.io/ios/app/chemquiz-aqa-gcse-chemistry/id6450217562) | — | Free | Education | | [My Past Papers](https://appshunter.io/ios/app/my-past-papers/id1492995959) | 4.9 (17) | Free | Education | | [My English Literature GCSE](https://appshunter.io/ios/app/my-english-literature-gcse/id1335737542) | — | Free | Education | | [UKUniApp](https://appshunter.io/ios/app/ukuniapp/id6450947731) | — | Free | Education | | [BioQuiz - AQA GCSE Biology](https://appshunter.io/ios/app/bioquiz-aqa-gcse-biology/id1635838546) | 4.9 (17) | Free | Education | | [PhysQuiz - AQA GCSE Physics](https://appshunter.io/ios/app/physquiz-aqa-gcse-physics/id1473746574) | 4.9 (16) | Free | Education | --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-06-01.*