Comparison

23 Equations vs NU Open Day

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

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.

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
Read full description

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.

About

NU Open Day

Navigate university life with this official companion app. Discover events, find buildings on an interactive map, and access live travel information. Explore accommodation options and stay updated with campus news.

Highlights
  • Personalized event planner
  • Interactive campus map with walking routes
  • Live travel information for buses and trains
  • Accommodation finder
  • University news and student tips blog
Read full description

Welcome to the all-new Newcastle University Open Day app, your official pocket guide to university life! Whether you're visiting for an Open Day, just starting your journey with us, or are a current student, NU Open Day has everything you need to make the most of your time here. Key Features: Your Open Day Toolkit: Explore everything on offer, view event schedules, and stay organised. Simply tap an event to save it to your personal planner! Interactive Campus Map: Find any university building, lecture hall, or cafe with ease. Our map provides step-by-step walking routes to get you exactly where you need to be. Live Travel Information: Get real-time bus and train times to and from campus to make your commute simpler than ever. Accommodation Finder: Search, sort, and view all our campus accommodation options to find the perfect place to live. Stay in the Know: Explore our integrated blog for the latest university news, announcements, and helpful tips for student life. Download the NU Open Day app today and start exploring!

Screenshots

23 Equations4 screens
NU Open Day4 screens

Verdict

The call

The clearest difference is in-app purchases: NU Open Day at none against 23 Equations's 7. 23 Equations's advantage is iOS requirement (9.3 vs 15.1). On price, update cadence, 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. 23 Equations sells 7 one-off in-app purchases. NU Open Day asks for nothing beyond the download.

UpkeepUpdate frequency

23 Equations ships an update every 2 weeks, NU Open Day monthly. The most recent releases landed on June 1, 2026 and July 6, 2026 respectively.

Scorecard3 real differences · 7 level
23 Equations versus NU Open Day: the parameters behind the verdict, then further details
Parameter23 EquationsNU Open Day
PriceFreeFree
Rating5.0 (1 ratings) — better—
Positive reviews47.6% of reviews—
Number of ratings1 — better—
Update frequencyEvery 2 weeks — betterMonthly
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchasesFree — better
DevicesiPhone, iPad, iPod — betteriPhone, iPod
Requires iOS9.3 — better15.1
Further details — not scored
Size143 MB115 MB
Age rating4+17+
DeveloperNick WhitehurstNewcastle University

In-app purchases

7 purchases

23 Equations

One-time7
  • Individual: Extra features$1.99
  • School Room, 2022 Exams (S)$39.99
  • School Room, 2023 Exams (S)$39.99
Show 4 more
  • 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
None

NU Open Day

No in-app purchases

Questions

Is 23 Equations free?
23 Equations is free to download, with in-app purchases available.
Is NU Open Day free?
NU Open Day is free to download, with no in-app purchases.
Do 23 Equations or NU Open Day have ads?
Neither 23 Equations nor NU Open Day shows ads.
Which is updated more often, 23 Equations or NU Open Day?
23 Equations ships an update every 2 weeks, and NU Open Day monthly. Most recently, 23 Equations was updated on June 1, 2026 and NU Open Day on July 6, 2026.

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