Btec Level 2 Unit 8 Introduction to App Development Assessment Brief 2026

Btec Level 2 Unit 8 Introduction To App Development Assessment Brief

Unit In Brief

Learners study the key features of developing and testing mobile applications (apps).

Unit Introduction

The rise of mobile technology, particularly smartphones and tablets, has reinvigorated and transformed the software development market, with countless apps produced daily that inform, educate, or simply entertain.
In this unit, you will discover how to design and create an app, typically through a hybrid of programming constructs. You will focus on the interface techniques of the target device, including voice recognition and gesture control, and on the correct use of third-party libraries that assist development.

Learning Aims

In this unit you will:
A. Investigate apps and mobile devices

B. Design an app to meet given requirements

C. Develop and test an app to meet given requirements.

Summary Of Unit

Learning Aim A: Investigate Apps And Mobile Devices

A1 Typical Uses Of Apps

Uses of apps, including:

• providing information, e.g. news sites, social media
• navigation in the physical world, e.g. online maps, global positioning system (GPS) navigation, location identification, nearest facilities such as train stations or food outlet
• entertainment, e.g. music and video streaming, online gaming
• leisure and fitness, e.g. fitness tracking, daily steps, workout trackers, diet and calorie monitoring
• communication, e.g. group messaging, video calling and conferencing
• augmented reality.

A2 Features Of Apps

Key features and characteristics:

• user-friendliness, e.g. the features of the interface/screens that are presented to the user, ways that the user communicates with the app and makes things happen
• dependence on hardware
• interface elements
• integration with standard operating-system software, e.g. contacts list, text messaging
• platforms and compatibility.

A3 Mobile Platforms

Considerations in relation to mobile platforms when developing apps.
Awareness of platform types:

• commercial deployment platforms:
  ➢ Apple iOS® for iPhone, iPad
  ➢ android
  ➢ Windows®
• free deployment platforms:
  ➢ Java ME
  ➢ web browser.

Integration with special hardware:

• multi-touch screen
• camera
• microphone
• Global Positioning System (GPS)
• accelerometer
• fingerprint sensor.

Integration with special software:

• voice recognition
• gesture recognition
• face recognition.

Learning Aim B: Design An App To Meet Given Requirements

B1 Factors Affecting App Design

Interpreting user requirements, to include:

• functionality of the app
• complexity of the app, e.g. basic features and standard UI options, custom UI and real-time features, media processing and real-time sync
• target audience, e.g. age, interests, accessibility
• technical features (integration with special hardware/software).

B2 Design Documentation For An App

Components and preparation of design documentation.
Target platform for Apple iOS, android, Windows.

Accessibility considerations, where relevant:

• vision
• hearing
• physical and motor skills
• learning and literacy.

User experience (UX) design:

• information architecture
• wireframing
• clickable prototype.

User interface (UI) design:

• style guides
• rendered design
• rendered click-through design.

Programming design:

• pre-defined code
• flow charts
• pseudocode
• control structures
• data validation.

Assets to be used:

• graphics
• audio
• video.

Rationale for design choices and decisions in relation to user requirements.

Learning Aim C: Develop And Test An App To Meet Given Requirements

C1 Programming Constructs

Processes and operations required to develop and refine software:

• constants
• operators
  ➢ arithmetic
  ➢ relational
  ➢ logical.

Handling data in an app:

• input and output commands
• local variables
• global variables
• data types:
  ➢ char, integer, real/float, boolean, string.

Control structures:

• sequence
• selection
• iteration.

Event driven features of an app:

Event triggers:

• touch screen
• physical button presses
• gesture-based
• motion-based
• sound-based.

Event handling:

• common event handlers
  ➢ on load, click/touch, got focus, lost focus, key/swipe down, key/touch press, text changed
• custom event handlers
• adding event handlers
• raising event handlers
• removing event handlers.

Device capabilities for apps:

• language APIs
• Android sensor
• Apple iOS® core motion framework
• orientation of device:
  ➢ autodetection
  ➢ force orientation mode.

C2 Testing And Refining An App

Methods and processes required to test app functionality.

• Functionality testing against a test plan with the test data, e.g. normal, abnormal and extreme.
• Documenting improvements and refinements made to the software solution.
• Refining the app, to include:
  ➢ exporting assets to different file formats
  ➢ improving efficiency of the code
  ➢ redeveloping the user interface.

Assessment Criteria

Essential Information For Assignments

The recommended structure of assessment is shown in the unit summary, along with suitable forms of evidence. Section 6 Internal assessment gives information on setting assignments and there is also further information on our website.

There is a suggested maximum number of two summative assignments for this unit. The relationship of the learning aims and criteria is:

Learning aim: A (A.P1, A.P2, A.M1, A.D1)

Learning aims: B and C (B.P3, B.P4, C.P5, C.P6, B.M2, C.M3, C.M4, B.D2, C.D3)

Further Information For Teachers And Assessors

Resource Requirements

For learners to have every opportunity to achieve success in this unit, they will require full access to at least one IDE suitable for writing, editing and testing code in the program language selected by the centre.

Essential Information For Assessment Decisions

Learning Aim A

Learners review features, uses and platforms of two different apps.
For Distinction Standard, learners will provide a clear and balanced evaluation of the two apps designed for a given purpose. The uses, features and platforms will be addressed as outlined in the unit content.

The evidence will demonstrate high-quality written/oral communication through use of accurate and fluent technical vocabulary to support a well-structured and considered response that clearly connects chains of reasoning.

For Merit Standard, learners will provide an explanation of the uses, features, and platforms of two apps designed for a given purpose, as outlined in the unit content.

Overall, the evidence will be logically structured and sound. It may occasionally be basic in parts, for example including more generic statements that do not link to the context. The evidence may contain minor inaccuracies or omissions.

For Pass Standard, learners will outline the uses of two apps from the unit content along with the features and platforms, and the outlines will be generally correct and appropriate, for example, that Google maps is used for navigation purposes in the real world, providing a user-friendly interface and uses features such as AR for street view.

Learning Aim B

For Distinction Standard, learners must draw on knowledge across the learning aim to produce a comprehensive design for an app.
Learners must thoroughly consider the factors affecting the design of the app and can fully justify their thinking and decisions in the completed design rationale. The design documentation will fully examine considerations needed to produce the desired user experience and will meet all criteria given in the design brief. For example, learners will have considered accessibility, have UX & UI designs as well as logical flowcharts/pseudocode for program design.

These documents must be of sufficient clarity and detail that if required a third party could, with minimal difficulty, create the mobile app using the learner’s design documentation.

At this level learners must make appropriate use of technical vocabulary to effectively support the points they make.

For Merit Standard, Learners must consider the factors affecting the design of the app and can explain their decisions in the completed design rationale. The design documentation will evidence that they have generally considered the desired user experience and will meet the criteria given in the design brief, although some of their approaches may be generic in nature. For example, learners will have considered accessibility, produced some UX and UI designs, but they may not have logical flowcharts/pseudocode for program design.

At this level, the design documentation must be of a reasonable quality, so that a third party could mostly create the mobile app, but there may be some minor difficulties due to lack of detail or clarity in places.

For Pass Standard, Learners must consider the factors affecting the design of the app and will outline their decisions in the completed design rationale. The design documentation will evidence that they have generally considered the desired user experience, although there may be some omissions, and will mostly meet the criteria given in the design brief. Their approaches to the design will be appropriate but may be limited in scope. For example, learners will have attempted UX and UI designs, but they may not have fully considered accessibility and may not have logical flowcharts/pseudocode for program design.

At this level the designs will provide details of app features that are clearly identifiable, and accurate communication of some key design features/tools, but they may be hampered by lack of clarity or omissions so that that a third party would require assistance when attempting to use them to create the mobile app.

Overall, the evidence will be logically structured. It may be basic in parts, for example covering more generic statements that do not link to the context. The evidence may contain minor inaccuracies or omissions.

Learning Aim C

For Distinction Standard, learners must draw on knowledge across the learning aim to develop an app based on their own comprehensive designs.
Learners must make effective use of tools and features provided in an app development environment to produce an app that clearly and effectively demonstrates the style, purpose and user requirements of the app. At this level, the app must contain sufficient detail and functionality to allow technical audiences such as managers other developers to provide feedback.

The app must be fully tested for functionality, quality and usability as outlined in the unit content.

Learners must produce evidence of refining the app based on testing and produce a justified rationale for changes made to the code and possible further improvements.

For Merit Standard, learners must develop an app based on their own detailed designs.

Learners must make effective use of tools and features provided in an app development environment to produce an app that clearly and effectively demonstrates some parts of the style, purpose, and user requirements of the app. At this level, the app must contain sufficient detail and functionality but may have small issues although it will allow technical audiences such as managers or other developers to provide feedback.

There must be some evidence of the app being tested for functionality, quality and usability as outlined in the unit content.

Learners must produce some evidence of refining the app based on testing and produce a rationale for changes made.

For Pass Standard, learners must develop an app based on their own designs.

Learners must make use of tools and features provided in an app development environment to produce an app that demonstrates the style, purpose and some user requirements of the app. At this level, the app must contain some detail and some functionality to allow technical audiences such as managers or other developers to provide feedback. Parts of the app will be fully functional but may contain some issues relating to quality.

There must be evidence of the app being tested for functionality, quality and usability as outlined in the unit content, although this evidence may be brief in parts.

Learners must identify the changes made as a result of testing to make the app fit for purpose, which can either be annotated in the code or in a written document.

Overall, the evidence will be logically structured. It may be basic in parts, for example covering more generic statements that do not link to the context. The evidence may contain minor inaccuracies or omissions.

Links To Other Units And Curriculum Subjects

This unit links to:
Unit 5: Introduction to Programming
International GCSE/core curriculum in Information Technology.

Opportunities To Develop Transferable Employability Skills

In completing this unit, learners will have the opportunity to develop skills in research and planning, problem-solving, responsibility, and communication.

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