Android

Kotlin and Java are two powerful general-purpose languages popular for Android and beyond. We’ll discuss their top features and differences, then focus on how to smoothly transition between the two.

The functional reactive programming (FRP) paradigm is becoming increasingly mainstream. In this installment, we discuss FRP essentials like system design and libraries, and implement a sample application.

This tutorial explores the mathematical concepts behind two key programming paradigms, functional programming and reactive programming, so you can build long-lasting Android architecture.

Google's Flutter framework has quickly caught on among developers who want to target Android and iOS from the same codebase—and businesses who know the value of a single project team yielding presence in both markets.

It’s not every day that a client asks a developer to create a mobile app that cannot be closed, but this can be a crucial feature for Point of Sale (POS) devices. In this article, Toptal Software Developer Tudor Filip Stupariu demonstrates how he built an Android POS app that can’t be closed.

Subscription-based apps need a special approach when it comes to analytics. Learn how a variation on the traditional sales funnel helps you work with LTV, subscriber retention, and churn rates to make your app better—and more profitable.

In an era of cross-platform mobile development, it is crucial to understand the specifics of different operating systems and hardware. In this article, Mobile Developer Martin Doychev lists a number of bad practices employed while creating apps for iOS and Android and explains what you should and shouldn’t do.

Building a mobile app isn't cheap—and the harsh reality is that most apps fail. Find out how to leverage fundamental analytics metrics to make sure your app actually turns a profit.

Cross-platform mobile apps are increasingly being built with React Native. But how can you scan for QR codes and augment the user's camera view when they're present?