# Patterns Interview Trainer > Master GoF Patterns, SOLID & Architecture with interactive quizzes and exams. Canonical page: [https://chrome-stats.com/d/com.softdevelopua.TrainerForPatterns](https://chrome-stats.com/d/com.softdevelopua.TrainerForPatterns) ## Overview - **ID:** `com.softdevelopua.TrainerForPatterns` - **Platform:** Android - **Type:** Android app - **Status:** Available - **Publisher:** softdevelop.ua - **Category:** EDUCATION - **Downloads:** 1 - **Version:** 1.0.2.3 - **Last updated:** 2026-09-30 - **First published:** 2026-09-30 - **Publisher country:** UA - **Size:** 53 MB - **Data as of:** 2026-10-19 - **Store listing:** [Google Play Store](https://play.google.com/store/apps/details?id=com.softdevelopua.TrainerForPatterns) - **Website:** [https://leon68-dev.github.io/index.html](https://leon68-dev.github.io/index.html) - **Privacy policy:** [https://leon68-dev.github.io/privacy-policy-interview-trainer.html](https://leon68-dev.github.io/privacy-policy-interview-trainer.html) ## Description Pattern Interview Trainer is an interactive, educational mobile application designed to help software engineers, backend developers, system architects, and students master Object-Oriented Design, GoF Design Patterns, and Software Architecture. Packed with 512 comprehensive questions and answers (256 Junior & 256 Middle), this app is your ultimate companion whether you are preparing for a technical interview, expanding your architectural mindset, or aiming for an engineering promotion.
Don't just memorize definitions from textbook diagrams — understand the trade-offs, real-world use cases, and implementations (with practical OOP code snippets and C# idioms). Our comprehensive database bridges the gap between abstract academic theory and maintainable, production-ready enterprise software development.

Core Topics Covered (8 Essential Modules):
• SOLID Principles & Clean Code
• GRASP Principles & OOP Design
• Creational Patterns
• Structural Patterns
• Behavioral Patterns: Core
• Behavioral Patterns: Advanced
• Architectural & Enterprise Patterns
• Refactoring, Code Smells & Anti-Patterns

Key Features
• Interview-Focused Curriculum (512 Q&A): Practice with 256 Junior-level and 256 Middle-level questions with exhaustive answers, directly addressing real questions asked during architectural and technical interviews.
• Interactive Study Mode: Browse through questions categorized by topic. Each question includes clear explanations, practical code snippets (including idiomatic C# and modern OOP approaches), trade-offs, and "when to use vs. when to avoid".
• Customizable Mock Interviews: Tailor your training session! Choose your difficulty level (Junior or Middle) and select how many questions to pull randomly from each pattern category.
• Exam Simulation Mode: Train yourself under realistic pressure with an active countdown timer, structured question batches, and a comprehensive post-test review.
• Categorical Performance Analytics: Pinpoint your architectural blind spots. Track your progress, review past attempts in the Best Scores tab, and see whether you need to brush up on Behavioral Patterns, GRASP, or Refactoring.
• Achievements & Streaks: Build consistent daily learning habits with streak counters and unlock achievement badges as your knowledge grows.
• Full Localization: Native support for 5 languages: English, Ukrainian (Українська), German (Deutsch), Spanish (Español), and French (Français).
• User-Friendly Customization: Includes haptic feedback, dark/light themes, and custom font scaling for optimal readability. ## Rankings - #3,329,472 — Overall ## Permissions and access ### Permissions - `android.permission.ACCESS_ADSERVICES_AD_ID` - `android.permission.ACCESS_ADSERVICES_ATTRIBUTION` - `android.permission.ACCESS_ADSERVICES_TOPICS` - `android.permission.ACCESS_NETWORK_STATE` - `android.permission.FOREGROUND_SERVICE` - `android.permission.INTERNET` - `android.permission.RECEIVE_BOOT_COMPLETED` - `android.permission.VIBRATE` - `android.permission.WAKE_LOCK` - `com.android.vending.BILLING` - `com.android.vending.CHECK_LICENSE` - `com.google.android.finsky.permission.BIND_GET_INSTALL_REFERRER_SERVICE` - `com.google.android.gms.permission.AD_ID` - `com.softdevelopua.TrainerForPatterns.DYNAMIC_RECEIVER_NOT_EXPORTED_PERMISSION` ## Similar extensions and apps - [Design Patterns in Java](https://chrome-stats.com/d/in.softecks.designpatternsinjava) — 14,841 users - [Design Patterns Interview Prep](https://chrome-stats.com/d/learn.DesignPatternsInterview) — 3,343 users - [Design Patterns in Java Pro](https://chrome-stats.com/d/in.softecks.designpatternsinjava.pro) — 56 users - [Pattern Master](https://chrome-stats.com/d/com.learn.designpattern) — 12 users - [Pattern Programs](https://chrome-stats.com/d/com.noobdev7.learnpatterns) — 32 users - [QuizIt](https://chrome-stats.com/d/com.shritechkit.quizit) — 4 users - [Java Patterns: Code & Learn](https://chrome-stats.com/d/com.younggeekapps.javapatternprograms) — 8 users - [Algorithms Interview Trainer](https://chrome-stats.com/d/com.softdevelopua.TrainerForAlgorithms) - [Python Patterns: Code & Learn](https://chrome-stats.com/d/com.younggeekapps.pythonpatternprograms) — 2 users - [Java InterviewMaster](https://chrome-stats.com/d/com.yourname.javainterviewmaster) — 48 users - [Design Patterns Quiz](https://chrome-stats.com/d/apps.bragion.designpatterns) — 35 users - [Java Interview Questions Pro](https://chrome-stats.com/d/com.republiclabs.javainterviewpro) — 251 users --- Source: [Chrome-Stats](https://chrome-stats.com/d/com.softdevelopua.TrainerForPatterns)