Comparison

Stack Testers Revision Friend vs CS Revision

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

Head to head
About

Stack Testers Revision Friend

This revision aid offers multiple-choice questions for UK Stack Testers preparing for MCERTS examinations. It stores test results, provides progress charts, and includes links to essential documents and external resources.

Highlights
  • MCERTS examination practice questions
  • Multiple choice tests
  • Stored test results
  • Progress tracking charts
  • Useful documents and links
  • Image gallery
Features
Read full description

Stack Testers Revision Friend is the latest addition to the suite of apps developed by the Engineers of CES Environmental Instruments, one of the UKs leading environmental Test Houses. The app has been developed as a revision aid to UK Stack Testers in their preparation for the Environment Agency’s MCERTS examinations. The app provides an ever ready reference source for all the current Level 1, Level 2, TE1, TE2, TE3 & TE4 examinations. The revision is in the form of multiple choice and narrative questions, now providing a broader range of practice material to help you get through your MCERTS examinations. Test results are stored within the app and can be reviewed in the analytic section by a comprehensive progress chart showing the subject areas that need development. The Useful Documents section contains information of the documents needed for examination revision and links to the up to date Method Implementation Documents (MIDs) and Technical Guidance Notes (TGNs) published by the Environment Agency. There are links to web sites providing additional revision information and a helpful image gallery.

About

CS Revision

This app provides revision notes, code snippets, and diagrams for International Baccalaureate Computer Science students. It includes practice questions, progress tracking, and a forum for discussion and motivation.

Highlights
  • Revision notes
  • Code snippets and diagrams
  • Progress tracking
  • MCQ and exam-style practice questions
  • Discussion forum
  • Friend motivation features
Features
Read full description

CS Revision helps you revise IB Diploma Computer Science in one focused place: learn a topic, practise it, then review what you got wrong until it sticks. LEARN EVERY TOPIC STEP BY STEP • 27 structured topics across Theme A, Theme B and the course components • Clear explanations, key ideas, worked examples and tables • Code examples in Python or Java, with syntax highlighting. Choose your language once. • Standard Level and Higher Level: HL-only material is labelled and can be hidden • Search, filter and bookmark topics PRACTISE WITH ORIGINAL QUESTIONS • Over 1,100 original practice questions written for this app • Single-answer, multiple-answer, code-output and short-answer questions • Instant feedback with an explanation for every question • Quick practice, topic practice and timed Theme A and Theme B practice sets • Report any answer that looks wrong straight from the question REVIEW AT THE RIGHT TIME • A spaced-review queue brings back questions just before you are likely to forget them • Progress charts, topic mastery and your weakest topics at a glance • A Due Review widget for your Home Screen • Optional daily practice reminders at a time you choose ASK THE QUESTION COACH Ask a follow-up about the lesson or question you are studying. The Question Coach uses Apple Intelligence on your device, so your questions are not sent to the developer or saved. It needs an iPhone or iPad that supports Apple Intelligence, with Apple Intelligence turned on. Responses are generated and can contain mistakes, so check them against the lesson. PRIVATE BY DESIGN • No account or sign-in • Your study profile and progress can sync between your iPhone and iPad through your own private iCloud • No advertising, no tracking and no third-party analytics • Export your progress or reset it at any time FREE AND FULL ACCESS Free: a selection of lessons and practice questions with explanations, up to three due review questions at a time, and one Question Coach conversation. Full Access (one-time in-app purchase): every lesson and question, unlimited practice and review, timed practice sets and unlimited Question Coach conversations. It is a single purchase with no subscription, and you can restore it on your other devices. CS Revision was developed independently from, and is not endorsed by, the International Baccalaureate (IB). International Baccalaureate and IB are registered trademarks of the International Baccalaureate Organization. All lessons and questions are original study material. They are not official IB examination questions or markschemes. Use the app alongside your teacher's guidance and the official course materials from your school. Terms of Use: https://grigor-dochev.github.io/ib-cs-revision-help/terms/

Screenshots

Stack Testers Revision Friend4 screens
CS Revision3 screens

Verdict

The call

The clearest difference is update cadence: Stack Testers Revision Friend at every 7 months against CS Revision's every 34 months. Stack Testers Revision Friend also leads on iOS requirement (15.0 vs 26.0). On price, ads, in-app purchases and monetization model 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. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Stack Testers Revision Friend ships an update every 7 months, CS Revision every 34 months. The most recent releases landed on October 14, 2026 and October 8, 2026 respectively.

Scorecard2 real differences · 8 level
Stack Testers Revision Friend versus CS Revision: the parameters behind the verdict, then further details
ParameterStack Testers Revision FriendCS Revision
PriceFreeFree
Rating—3.0 (1 ratings) — better
Positive reviews100.0% of reviews—
Number of ratings—1 — better
Update frequencyEvery 7 months — betterEvery 34 months
AdsNoNo
In-app purchasesNoNo
MonetizationFreeFree
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS15.0 — better26.0
Further details — not scored
Size19 MB15 MB
Age rating4+4+
DeveloperLewis HolmesGrigor Dochev

Customer experience

Stack Testers Revision Friend

Written reviews2 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

CS Revision

All ratings1 ratings
Positive0.0%
Neutral100.0%
Negative0.0%

In-app purchases

None

Stack Testers Revision Friend

No in-app purchases

None

CS Revision

No in-app purchases

Questions

Is Stack Testers Revision Friend free?
Stack Testers Revision Friend is free to download, with no in-app purchases.
Is CS Revision free?
CS Revision is free to download, with no in-app purchases.
Do Stack Testers Revision Friend or CS Revision have ads?
Neither Stack Testers Revision Friend nor CS Revision shows ads.
Which is updated more often, Stack Testers Revision Friend or CS Revision?
Stack Testers Revision Friend ships an update every 7 months, and CS Revision every 34 months. Most recently, Stack Testers Revision Friend was updated on October 14, 2026 and CS Revision on October 8, 2026.

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