# 23 Equations vs Physics The clearest difference is review sentiment: Physics at 100% against 23 Equations's 48%. Physics also leads on ratings volume (18 vs 1). 23 Equations's advantage is rating (5.0 vs 4.7) and update cadence (every 2 weeks vs every 2 months). On price, ads, in-app purchases and monetization model there is nothing between them. Both are free to download. 23 Equations sells 7 one-off in-app purchases and Physics sells 4 in-app purchases, starting at $1.99 per month. Whichever you choose, the download price is not the number that matters. 23 Equations holds the better App Store score, 5.0 against 4.7. That said, the two scores are not equally well evidenced: Physics has 18 ratings behind it against 1, so its average is the more settled of the two. Written reviews complicate that: 48% of 23 Equations's written reviews are positive against 100% of Physics's, so the app with the better star average is not the one people write more warmly about. 23 Equations ships an update every 2 weeks, Physics every 2 months. The most recent releases landed on September 26, 2026 and October 1, 2026 respectively. ## The numbers | Metric | 23 Equations | Physics | | --- | --- | --- | | Price | Free | Free | | Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/23-equations/id1451090127/reviews)** | [4.7 (18 ratings)](https://appshunter.io/ios/app/physics-formulas-2026/id1495587959/reviews) | | Number of ratings | 1 | **18** | | Positive reviews | 47.6% of reviews | **100.0% of reviews** | | In-app purchases | Yes | Yes | | Ads | No | No | | Update frequency | **Every 2 weeks** | Every 2 months | | Monetization | Free with in-app purchases | Free with in-app purchases | | Size | 143 MB | 25 MB | | Requires iOS | **9.3** | 17.0 | | Devices | **iPhone, iPad, iPod** | iPhone | | Age rating | 4+ | 4+ | | Developer | [Nick Whitehurst](https://appshunter.io/developer/1451090126) | [Nikita Chernykh](https://appshunter.io/developer/1448243728) | ## 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 | ### Physics [App page](https://appshunter.io/ios/app/physics-formulas-2026/id1495587959) This interactive reference app provides a comprehensive collection of physics terms, formulas, and calculators. It's designed to help users prepare for tests and Olympiads by offering clear explanations, interactive tables, and internal search functionality. **Highlights:** 280+ physics terms and definitions, 250+ categorized physics formulas, 180+ interactive calculators, Interactive tables for knowledge assimilation, Internal search for terms and formulas, Convenient in-app navigation **In-app purchases (4)** | Purchase | Price | Billing | | --- | --- | --- | | Professional 1 Month | $1.99 | per month | | Professional 6 Month | $6.99 | per 6 months | | Professional 12 Month | $14.99 | per year | | Professional - unlimited | $24.99 | one-time | ## Frequently asked questions ### Is 23 Equations free? 23 Equations is free to download, with in-app purchases available. ### Is Physics free? Physics is free to download, with in-app purchases available. ### Which has better reviews, 23 Equations or Physics? 23 Equations is rated higher. 23 Equations averages 5.0 out of 5 from 1 ratings, while Physics averages 4.7 from 18 ratings. ### Do 23 Equations or Physics have ads? Neither 23 Equations nor Physics shows ads. ### Which is updated more often, 23 Equations or Physics? 23 Equations ships an update every 2 weeks, and Physics every 2 months. Most recently, 23 Equations was updated on September 26, 2026 and Physics on October 1, 2026. --- *Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*