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Kotlin annotations allow compilers or libraries to understand our code. These metadata tags don’t directly change code logic, but they help modify how it is interpreted, optimized, or validated. This simplifies Android development by automating repetitive tasks and ensuring consistent code behavior. It also improves code readability, reduces boilerplate code, and introduces automated checks and generation.

Remote debugging is the most reliable way to grasp what’s really happening inside a mobile app once it’s out in the wild. We’re talking crashes that never appear in development, and issues from users that can’t be reproduced locally. If you ship mobile apps, you’ve been vexed by these problems at some point.

Chrome developer tools, or Chrome DevTools, give us a window on how our websites working in the wild. Built for developers of all experience grades, they provide powerful ways to inspect, debug and optimize our projects. However the sheer breadth of functionality can be a mind-melt if you’ve not worked with DevTools before, and there are lots of advanced features that even experienced users find tricky.

iOS code signing is a critical step in app development, ensuring apps are secure and trusted by Apple and users. However, it often leads to frustrating errors that can disrupt development and delay app launches. Here’s what you need to know.

Non-crashing bugs don’t make your app crash, but they can ruin the user experience and hurt your app’s ratings. Fixing these issues is critical to keeping users happy. Here’s a quick rundown of the most common non-crashing bugs and how to address them.

Concurrency means running multiple tasks at the same time, and it’s a great way to ensure our apps stay responsive. Swift 5.5 introduced structured concurrency and the closely related concept of async/await to improve the management of asynchronous code, part of a wave of changes designed to ensure simpler code, improved error handling and automatic task lifecycle management.

Debugging React Native apps can be challenging, but using the right tools and techniques makes it manageable. Here’s what you need to know.

Modern app users don’t tolerate glitches — speed and stability are non-negotiable. Debugging across multiple Android devices, however, can be tedious if done manually. That’s why developers rely on Android Debug Bridge (ADB) to streamline development. With ADB, we can: In this guide, we’ll cover what ADB is, how it works, installation steps, and the most useful commands for debugging Android applications.

In less than 20 years, mobile apps have grown from a bright new idea to a cornerstone of our daily lives. And while Android accounts for the lion’s share of the market, iOS usage continues to grow exponentially: in 2024 alone, iOS apps and games were downloaded around 35 billion times. The Apple App Store is both a shop window and a marketplace for this global industry. But as iOS developers, how do we actually submit a mobile app to the store?

Sealed classes are a special kind of class in Kotlin, used to create restricted hierachies — where the full list of sub-classes is strictly limited, and known in advance. This is particularly useful when we want to enhance the power of Kotlin’s when statement, model a type that has a fixed set of possible variations, or represent a fixed group of states or outcomes (such as network responses, UI states and form validations).