Mobile Development Knowledge Base
Platforms and Operating Systems in Mobile Development: What They Are, Architecture, and How They Work
What are mobile OS and platforms in app development. How Android, iOS, and HarmonyOS are structured, what components they consist of, and what role they play in mobile projects....
Programming languages in mobile development: what they are, what types exist, and how to choose
We explore what programming languages are in mobile development. What Kotlin, Swift, Dart and Java are used for, how they differ, and which one to choose to get started....
IDE and tools in mobile development: what they are, types and how to choose
Understand what IDE and mobile app development tools are. What Android Studio, Xcode, VS Code, emulators and build systems are needed for in a project....
Mobile App Types in Development: What They Are, How They Differ, and How to Choose
What are mobile app types in development. How native, cross-platform, PWA, Widget and Watch App differ and how to choose for your task....
Architecture and Patterns in Mobile Development: What They Are, Types, and How to Apply Them
Explaining what mobile app architecture and patterns are. What approaches exist, how MVC, MVVM, and Clean Architecture differ, and how to apply them in development....
UI/UX and Components in Mobile Development: What They Are, Types, and How to Use
Learn what UI/UX and components are in mobile development. What tools and libraries exist and how to apply Material Design, SwiftUI, Jetpack Compose in your project....
Animation in mobile development: what it is, types and how to use
What is animation in mobile applications. What types and tools are used, how Property Animation, Core Animation and Lottie differ....
Lifecycle in Mobile Development: what it is, stages and how it works
Let's break down what the mobile app lifecycle is. What stages and states Activity and ViewController go through in iOS and Android and how to manage them in development....
Network and Communications in Mobile Development: What It Is, Which Protocols and How It Works
What is network and communications in mobile applications. How REST, GraphQL, WebSocket work, what tools are used and how to configure network interaction in a project....
Data Storage in Mobile Development: What It Is, Methods, and How It Works
Learn about data storage in mobile applications. Explore SQLite, Room, Core Data, Firebase, and how to choose the right approach for your project....
Multithreading and Concurrency in Mobile Development: What It Is, Principles and How It Works
Understanding what multithreading and concurrency in mobile applications are. How Main Thread, Coroutines, GCD and RxSwift work and how to avoid synchronization problems....
Push Notifications in Mobile Development: Essence, Types and How They Work
What are Push Notifications in mobile apps. How FCM and APNS work, what types of notifications exist and how to set up their sending in a project....
Hardware features in mobile development: what they are, types, and how to use them
What are hardware features in mobile applications. Which sensors, camera, biometrics, and NFC are available and how to work with them in iOS and Android projects....
Background Tasks in Mobile Development: What They Are, Types, and How They Work
We explain what background tasks are in mobile apps. How WorkManager, BGTaskScheduler, and Foreground Service work and how background mechanisms differ in iOS and Android....
Performance in Mobile Development: What It Is, Key Metrics and How to Improve
What is mobile app performance? Which metrics affect what, why ANR and memory leaks are dangerous, and how to optimize your application....
Security in Mobile Development: What It Is, What Threats Exist and How to Defend
Understanding what mobile app security is. What threats exist, how encryption, OAuth and Keychain work and what you need to know to protect data....
Testing in Mobile Development: What It Is, Types and How to Organize
What is mobile app testing. What levels and types of tests exist, how Unit, Integration and E2E differ, and how to set up the verification process....
CI/CD and Automation in Mobile Development: What It Is, How It Works and Why You Need It
Learn what CI/CD and mobile app automation are. How GitHub Actions, Bitrise and Fastlane work and how to set up a build and delivery pipeline....
Build and Deployment in Mobile Development: What It Is, What Formats, and How It Works
Let's break down what build and deployment of mobile applications are. How APK, AAB, and IPA differ, how code signing works, and how to publish an app in stores....
Analytics and Metrics in Mobile Development: What It Is, Key Indicators, and How to Use Them
What mobile app analytics and metrics are, which indicators to track, how DAU, Retention, and LTV differ, and what data collection tools exist....
Monetization in Mobile Development: What It Is, What Models and How It Works
Explaining what mobile app monetization is. What models exist, how Freemium, subscriptions and advertising differ, and how to choose a strategy for your project....
App Store Optimization in Mobile Development: What It Is, Key Factors, and How to Promote Your App
What is ASO in mobile development. Which factors influence promotion, how keywords, icon, and screenshots work, and how to improve app visibility in stores....
Firebase and Google Services in Mobile Development: What They Are, Services, and How to Use
We figure out what Firebase and Google Services are in mobile applications. What tools are available, how Analytics, Firestore and Authentication differ and how to integrate them i...
SDK and Frameworks in Mobile Development: What They Are, Types, and How to Choose
What are SDKs and frameworks in mobile development. How UIKit, SwiftUI, Jetpack Compose, and Flutter differ and how to choose a technology stack for your project....
Debugging and Diagnostics in Mobile Development: What It Is, What Tools, and How It Works
Learn what mobile app debugging and diagnostics are. What tools to use, how Debug differs from Release, and how to find problems in code....
Git and Version Control in Mobile Development: What It Is, Basic Commands and How It Works
What is Git and version control in mobile development. How Merge and Rebase differ, how to work with Pull Request and what code hosting platforms exist....
Architecture Principles in Mobile Development: What They Are, Types, and How to Apply
We explain what architecture principles in mobile development are. How SOLID, DRY, KISS, and GRASP differ and how their application affects code quality....
Deep Links and Universal Links in Mobile Development: What They Are, Types, and How to Configure
What are Deep Links and Universal Links in mobile apps. How link schemes work, differences between deep link types, and how to configure them on iOS and Android....
Accessibility in Mobile Development: What It Is, Standards, and How to Implement
What is accessibility in mobile applications. How VoiceOver, TalkBack, and WCAG work and how to make an app usable for all users....
Runtime, Hot Reload and Build in Mobile Development: What They Are, Key Concepts and How They Work
What are Runtime, Hot Reload and build in mobile development. How code optimization, Tree Shaking and build tools work and why they matter for your project....
Access Permissions and Privacy in Mobile Development: What It Is, Mechanisms, and How to Configure
Understanding access permissions and privacy in mobile applications. How Runtime Permission, ATT, and Privacy Manifest work and how to comply with iOS and Android requirements....
Media and Streaming in Mobile Development: What It Is, Protocols, and How It Works
Learn what media and streaming are in mobile apps. How HLS, ExoPlayer, AVPlayer, and DRM work, and which protocols are used for streaming....
Error Handling in Mobile Development: What It Is, Techniques, and How to Organize
We explain what error handling in mobile applications is. How try-catch, Result, and crash reporting work and which monitoring tools to use in your project....
Logging and Monitoring in Mobile Development: Essence, Tools, and How to Set Up
What it is — logging and monitoring of mobile applications. How os_log, Timber and CocoaLumberjack differ and how to set up error tracking via Sentry and APM....
Configuration Management in Mobile Development: What It Is, Options, and How to Set Up
Let's break down what mobile app configuration management is. How Build Variant, Scheme, and Product Flavor differ and how to set up environments from dev to production....
Real-time communications in mobile development: what it is, what protocols and how it works
What are Real-time communications in mobile applications. How WebRTC, WebSocket and SSE work and what protocols are used for real-time data exchange....
Cross-platform development in mobile applications: what it is, which frameworks and how it works
Understanding cross-platform mobile app development. How Flutter, React Native and Kotlin Multiplatform differ, what architectural mechanisms they use....
Mobile App Distribution: What It Is, Channels and How It Works
What is mobile app distribution. How TestFlight, Google Play Tracks and Enterprise Distribution work and what stages an app goes through before release....
Screen Architecture and Navigation in Mobile Development: What It Is, Types and How It Works
We explain what screen architecture and navigation in mobile applications are. How stacks, tabs and modal transitions differ and what tools are used in iOS and Android....
Graphics and Rendering in Mobile Development: What It Is, How the Process Works and How It Works
What graphics and rendering in mobile applications are. How CPU and GPU work, shaders and Core Animation, and what technologies are responsible for drawing on the screen....
Cache and Data Synchronization in Mobile Development: What It Is, Strategies, and How It Works
Learn what cache and data synchronization in mobile applications are. How LRU Cache, Offline Queue and Conflict Resolution work and what caching strategies are used in projects....
App Extensions and System Integrations in Mobile Development: What They Are, Types, and How They Work
What are App Extensions and system integrations in mobile apps. How WidgetKit, CallKit, PushKit, and Broadcast Receiver differ and how extensions interact with the system....
Swift specifics in mobile development: what it is, key features and how it works
Understanding Swift specifics in mobile development. How struct and class differ, how Actor, Property Wrappers and Generics work, and which language features you should know....
Kotlin specifics in mobile development: what it is, what constructs and how it works
What is Kotlin specifics in mobile development. How data class, sealed class, coroutines and scope functions work and what language features make code more convenient....
SwiftUI in Mobile Development: What It Is, Key Concepts and How It Works
What is SwiftUI in mobile development. How View Protocol, @ViewBuilder, NavigationStack and Property Wrappers work and how interfaces are built with SwiftUI....
Jetpack Compose in Mobile Development: What Is It, Key Concepts and How It Works
We explain what Jetpack Compose is in mobile development. How @Composable, Recomposition, State Hoisting and Modifier work and how UI is built with Compose....
Flutter in Mobile Development: What It Is, Key Concepts, and How It Works
What is Flutter in mobile development. How Widget, StatefulWidget, BuildContext, and Navigator work, and how the Flutter rendering interface is structured....
React Native in mobile development: what it is, key concepts and how it works
Learn what React Native is in mobile development. How JSX, Hooks, FlatList and Animated API work and how React Native interacts with native code....
User Input and Keyboards in Mobile Development: What It Is, Components and How It Works
What user input and keyboards are in mobile applications. How UITextField, EditText and Input Mask work and how to properly handle data input in iOS and Android....
File System and Documents in Mobile Development: What It Is, Principles, and How It Works
Let's explore what the file system and documents are in mobile apps. How Sandbox, Scoped Storage, and FileManager work and how file storage approaches differ between iOS and Androi...
Date and Time in Mobile Development: What It Is, Formats, and How to Work
What date and time are in mobile development. How DateFormatter, LocalDate, and TimeZone work, how Unix Timestamp and NTP differ, and how to avoid timezone errors....
Bluetooth Low Energy (BLE) in Mobile Development: What It Is, Protocols and How It Works
What is Bluetooth Low Energy in mobile applications. How Core Bluetooth, GATT, Service UUID and iBeacon work and how to set up a BLE connection in a project....
ML on Device in Mobile Development: What It Is, Frameworks, and How It Works
Learn what ML on device in mobile apps is. How Core ML, TensorFlow Lite, and ML Kit work and what machine learning capabilities are available on mobile platforms....
Custom Views and Drawing in Mobile Development: Core Concepts, APIs, and How They Work
Understanding custom Views and drawing in mobile apps. How drawRect, Canvas, and CustomPainter work and how to create your own graphic elements....
Text and Typography in Mobile Development: What It Is, Tools, and How It Works
We explain what text and typography in mobile apps are. How NSAttributedString, SpannableString, and custom fonts work and how to manage text display....
Jargon and Slang in Mobile Development: What It Is, Key Terms, and How It's Used
What is jargon and slang in mobile development. What terms do developers use, what do kóstyl', hardcode, crash, junior and senior mean, and how to understand colleagues....
What is a mobile development knowledge base
A mobile development knowledge base is a catalog of structured articles about building apps for iOS and Android. It contains materials on platforms and operating systems, programming languages, architecture and patterns, UI/UX, testing, security, CI/CD and app store publishing. Each topic is covered in detail — from basic concepts to practical code examples.
The materials are useful both for beginner developers taking their first steps in mobile development and for experienced specialists who want to systematize their knowledge or quickly find an answer to a specific question. Links between articles help to study related sections sequentially and build a complete picture of mobile app development.
The IT Sectr studio maintains the knowledge base based on its own experience in creating mobile and web applications. We constantly add new topics to the catalog, update materials in line with current versions of tools and publish only recommendations verified by practice.