Comparison

23 Equations vs Seneca

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

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.

Highlights
  • 1,000+ exam courses
  • AI-marked questions
  • Memory strength boosting
  • Exam technique mastery
  • Subject confidence building
Features
Read full description

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!

Screenshots

23 Equations4 screens
Seneca4 screens

Verdict

The call

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

CostPrice · In-app purchases · Ads · Monetization

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

ReceptionRating · Positive reviews · Number of ratings

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.

UpkeepUpdate frequency

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.

Scorecard7 real differences · 3 level
23 Equations versus Seneca: the parameters behind the verdict, then further details
Parameter23 EquationsSeneca
PriceFreeFree
Rating5.0 (1 ratings) — better3.3 (18 ratings)
Positive reviews47.6% of reviews — better23.5% of reviews
Number of ratings118 — better
Update frequencyEvery 2 weeks — betterEvery 2 months
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchasesFree — better
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS9.3 — better13.0
Further details — not scored
Size143 MB7 MB
Age rating4+4+
DeveloperNick WhitehurstSeneca Learning Ltd.

Customer experience

23 Equations

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews21 reviews
Positive47.6%
Neutral19.0%
Negative33.3%

Seneca

All ratings18 ratings
Positive61.1%
Neutral0.0%
Negative38.9%
Written reviews153 reviews
Positive23.5%
Neutral15.7%
Negative60.8%

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

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

Seneca

No in-app purchases

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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