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The Open Encyclopedia for Mobile App Development

Everything you need to know about building, growing, and monetizing mobile apps. From ASO to analytics, from UI/UX to store policies.

Try: paywall, ASO keywords, retention, review guidelines

ASOMonetizationStore PoliciesMetricsDevelopmentMarketing

Browse by Category

Eleven areas of mobile app development, from store optimization to infrastructure.

ASO

17 content

A guide to increasing your app's organic visibility on the App Store and Google Play. Covers keyword research, title and description optimization, screenshot design, icon strategy, A/B testing, localization, and competitor analysis.

Monetization

14 content

Strategies for generating revenue from mobile apps. Covers in-app purchases (IAP), auto-renewable subscriptions, freemium models, paywall design, ad monetization, pricing strategies, and Apple/Google commission structures in detail.

Store Policies

20 content

Apple App Store and Google Play store rules, review processes, and compliance requirements. Covers common rejection reasons, appeal process, privacy labels, ATT, content ratings, and kids category requirements.

Metrics

15 content

Critical metrics and analytics methods for measuring mobile app success. Covers DAU/MAU, retention rate, churn, ARPU/ARPPU, LTV, CAC, ROAS, conversion rate, cohort analysis, funnel analysis, and unit economics.

Development

25 content

Mobile app development tools, frameworks, and technical processes. Covers React Native, Flutter, Expo, Swift/SwiftUI, Kotlin/Jetpack Compose, CI/CD, code signing, TestFlight, deep linking, push notifications, OTA updates, and offline-first design.

Marketing

15 content

Mobile app marketing and user acquisition strategies. Covers user acquisition, attribution and MMP tools, pre-launch marketing, referral programs, social proof, influencer marketing, content marketing, and viral growth loops.

Legal

9 content

Legal compliance guide for mobile app developers. Covers GDPR, KVKK, COPPA regulations, privacy policy creation, open source licenses, and data protection obligations in detail.

UI/UX

14 content

Mobile app interface and user experience design principles. Covers Apple Human Interface Guidelines, Google Material Design, onboarding flows, accessibility, dark mode, navigation patterns, empty/loading states, haptic feedback, and responsive layout.

Testing

10 content

Mobile app testing processes and quality assurance. Covers beta testing, crash reporting (Crashlytics/Sentry), in-app A/B testing, performance profiling, unit testing, end-to-end testing, and device testing strategies.

Infrastructure

10 content

Mobile app backend infrastructure and service integrations. Covers Firebase, Supabase, analytics platforms, remote config and feature flag management, CDN and asset delivery, REST vs GraphQL API design, WebSocket real-time communication, and error monitoring systems.

Popular Topics

Start with the most essential concepts in mobile app development.

What Is ASO? The Complete App Store Optimization Guide for 2026
ASO4 min

What Is ASO? The Complete App Store Optimization Guide for 2026

Learn everything about App Store Optimization (ASO) - from keyword research to visual assets. A complete guide to boosting organic app downloads in 2026.

Free App Store & Google Play Localization Tool
ASO5 min

Free App Store & Google Play Localization Tool

A comprehensive guide to adapting your App Store and Google Play listings for different languages and markets.

In-App Purchase (IAP) Guide: Types, Integration, and Validation
Monetization4 min

In-App Purchase (IAP) Guide: Types, Integration, and Validation

Complete guide to in-app purchases covering consumable, non-consumable, and subscription types with server-side validation best practices.

Retention Rate Guide: D1, D7, and D30 Benchmarks for Mobile Apps
Metrics4 min

Retention Rate Guide: D1, D7, and D30 Benchmarks for Mobile Apps

A guide to mobile app retention rates with D1, D7, D30 benchmarks by category, calculation methods, and strategies to improve user retention.

React Native: Cross-Platform Mobile Development
Development5 min

React Native: Cross-Platform Mobile Development

A complete guide to React Native for building cross-platform iOS and Android apps with JavaScript and a single shared codebase in 2026.

How to Write a Privacy Policy for Your Mobile App in 2026
Legal3 min

How to Write a Privacy Policy for Your Mobile App in 2026

Step-by-step guide to writing a mobile app privacy policy. Covers required sections, legal frameworks, store requirements, and common mistakes.

Recently Updated

On-Device AI in Mobile Apps: Foundation Models and Gemini Nano
Development5 min

On-Device AI in Mobile Apps: Foundation Models and Gemini Nano

Build on-device AI with Apple's Foundation Models and Android's Gemini Nano: APIs, device support, cloud trade-offs, fallbacks and privacy labels.

Liquid Glass: Adopting Apple's iOS 26 Design Language in Your App
UI/UX5 min

Liquid Glass: Adopting Apple's iOS 26 Design Language in Your App

Adopt Liquid Glass in iOS 26: automatic changes, glassEffect and GlassEffectContainer, the opt-out key's end, Icon Composer, accessibility and migration.

Kotlin Multiplatform (KMP) and Compose Multiplatform in 2026
Development6 min

Kotlin Multiplatform (KMP) and Compose Multiplatform in 2026

Kotlin Multiplatform in 2026: sharing logic across Android and iOS, Compose Multiplatform status, key libraries, iOS interop and a KMP vs Flutter comparison.

Android Developer Verification: What Changes and How to Prepare
Store Policies6 min

Android Developer Verification: What Changes and How to Prepare

Google now requires verified developers for apps on certified Android devices, including sideloaded apps. Timeline, account types, fees and what to prepare.

Android 16 KB Page Size: Google Play Requirement and Fix Guide
Development5 min

Android 16 KB Page Size: Google Play Requirement and Fix Guide

What the 16 KB memory page size means on Android 15+, which apps Google Play affects, and how to check, fix and test native libraries for compliance.

Age Ratings and Age Assurance in 2026: Apple and Google Rules
Store Policies6 min

Age Ratings and Age Assurance in 2026: Apple and Google Rules

Apple's 13+, 16+ and 18+ ratings, the Declared Age Range API, Google Play Age Signals and US state app store laws: what developers must do in 2026.

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