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iPhone and iPad

CS Wizard iOS App for OCR A-Level Computer Science

All the notes, flashcards and exam questions from this site, offline, plus 11 step-through tools and confidence tracking for all 378 terms.

Download on the App Store

£0.99 once. No subscription, no adverts, no account. Screenshots show version 2, a free update for everyone who has the app.

The app’s Home screen: today’s Daily Deck of 20 cards, an 11 day streak and a countdown in days to Paper 1 and Paper 2.
Home
The Tools screen listing the FDE cycle tool and four binary tools, with data structures below.
Tools
The Dijkstra’s algorithm tool: a weighted graph with seven nodes, a start node A and an end node G, ready to trace.
Dijkstra's algorithm
The Karnaugh map tool with a four-variable map and two groups of four 1s outlined.
Karnaugh maps
A flashcard for the accumulator, marked Mastered, with four buttons to rate recall: Again, Hard, Good and Easy.
Rate every card
The Progress screen: 53% confidence across the course, 161 of 378 terms mastered, 92 needing review, 40 unfamiliar and 85 not rated.
Confidence

11 tools that show their working

Enter your own numbers, lists, graphs or Boolean expressions and step through the method one stage at a time, the way an exam question asks you to trace it.

Processor

Topic 1.1.1

  • FDE cycle

    Run a short program and follow the registers and buses

Binary

Topic 1.4.1

  • Denary to binary

    Convert step by step, by place value or by dividing by 2

  • Negative binary

    Two's complement and sign and magnitude

  • Binary addition

    Add column by column with carries, and see when it overflows

  • Binary subtraction

    Subtract by two's complement or by borrowing

Data structures

Topic 1.4.2

  • Stacks and queues

    Stack, linear queue and circular queue with their pointers

Boolean logic

Topic 1.4.3

  • Karnaugh maps

    Simplify a Boolean expression by grouping the 1s

Algorithms

Topic 2.3.1

  • Dijkstra's algorithm

    Build a graph and trace the shortest path as the table fills in

  • Linear search

    Check each item in turn

  • Binary search

    Halve a sorted list on every comparison

  • Sorting algorithms

    Bubble, insertion, merge and quick sort on the same list

Confidence tracking for every term

The app remembers how well you know each of the 378 terms, so revision time goes on the ones you are shaky on.

  1. 1

    Rate each card

    Flip a flashcard and say how well you recalled it: Again, Hard, Good or Easy. The Match game rates terms for you from how many tries each pair took.

  2. 2

    Let the app schedule it

    A card you found hard comes back soon. A card you know well waits days, then weeks. The Daily Deck picks what is due first, then adds something new.

  3. 3

    See what you know

    Every term is Mastered, Needs review, Unfamiliar or Not rated. The Progress tab shows your confidence for the whole course and for each of the 24 topics.

  4. 4

    Fix the weak spots

    Quick Review drills your weakest terms, and self-marked exam questions show which topics are losing you marks.

Also in the app

  • Notes for all 24 topics, the same ones as this site, readable offline
  • 378 flashcards, by topic or across the whole course
  • Past-paper questions with mark schemes that you mark yourself
  • A Daily Deck, a study streak and a countdown to both papers
  • Search across notes, terms and questions
  • Works on iPhone and iPad with no connection and no account. Your progress stays on your device.
Download on the App Store

The website stays free. The app is for students who want the tools and the tracking.