Comparison

23 Equations vs MyHSDC

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

MyHSDC

This app provides HSDC students and their parents/carers with live college information, including timetables, attendance, and assessment marks. It also sends important notifications about college events and activities directly to your device.

Highlights
  • Student timetable access
  • Exam timetable viewing
  • Attendance tracking
  • Absence reporting form
  • Assessment marks and teacher comments
  • Live notifications for events
Features
Read full description

An App for HSDC students and their parents /carers. This App is for HSDC students at the following campuses: Alton, Havant and South Downs. The MyHSDC App provides live information about progress at College and also enables notifications to be sent live to students, parents and carers. The following information is available via MyHSDC: Student timetable Exam timetable Attendance Form to report an absence Marks from assessments/mock exams Comments from teachers Meetings with tutor/teachers Targets set by teachers Targets set by students Log of enrichment activities Plans after college Also live notifications sent to you that pop up on your phone to alert you of important events/activities such as: To students and their parents/carers: “Staff Development Day tomorrow - college closed” To students: “Arrive at 9am in reception to meet for the New York trip"

Screenshots

23 Equations4 screens
MyHSDC4 screens

Verdict

The call

The clearest difference is review sentiment: 23 Equations at 48% against MyHSDC's 9%. 23 Equations also leads on update cadence (every 2 weeks vs every 2 months) and iOS requirement (9.3 vs 15.0). MyHSDC's advantage is in-app purchases (none vs 7). 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. MyHSDC asks for nothing beyond the download.

UpkeepUpdate frequency

23 Equations ships an update every 2 weeks, MyHSDC every 2 months. The most recent releases landed on June 1, 2026 and September 14, 2026 respectively.

Scorecard5 real differences · 5 level
23 Equations versus MyHSDC: the parameters behind the verdict, then further details
Parameter23 EquationsMyHSDC
PriceFreeFree
Rating5.0 (1 ratings) — better—
Positive reviews47.6% of reviews — better9.1% of reviews
Number of ratings1 — 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 — better15.0
Further details — not scored
Size143 MB29 MB
Age rating4+4+
DeveloperNick WhitehurstSystem Live

Customer experience

23 Equations

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

MyHSDC

Written reviews11 reviews
Positive9.1%
Neutral18.2%
Negative72.7%

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

MyHSDC

No in-app purchases

Questions

Is 23 Equations free?
23 Equations is free to download, with in-app purchases available.
Is MyHSDC free?
MyHSDC is free to download, with no in-app purchases.
Do 23 Equations or MyHSDC have ads?
Neither 23 Equations nor MyHSDC shows ads.
Which is updated more often, 23 Equations or MyHSDC?
23 Equations ships an update every 2 weeks, and MyHSDC every 2 months. Most recently, 23 Equations was updated on June 1, 2026 and MyHSDC on September 14, 2026.

Other comparisons