In this article, we curated a list of the best Kotlin starter kits that are available as of the time of this writing. Kotlin is the new cool kid in town: Google’s new programming language for coding up Android apps. It brings up a lot of value on the table, through amazing modern features such as higher order functions and lambdas, which were not supported in Java. With Kotlin, Google is shifting the paradigm towards functional programming, which can also be seen as a response to Apple adopting Swift.

Kotlin is extremely powerful and Android developers should adopt it as soon as possible. An effective way of ramping up on Kotlin is to download an existing free starter kit, to learn practically. By getting used to the Kotlin syntax and by making a few changes to existing open-source Kotlin templates, an Android developer can quickly incorporate the new language.

Android Pay and Apple Pay have gained a lot of ground in the recent years and they’ve become the new standard for payments in mobile apps. If you have a native checkout experience in your apps, consider using them as your main method of payment. Otherwise, you’ll be missing on great opportunities. If you’re looking to integrate payments into your mobile app, check out our React Native shopping app, which can save you months of hard work, design and development.

Our mission at Instamobile is to enable mobile developers and entrepreneurs launch their dream app as fast as possible, by automating most of the process required for designing, developing and releasing an app. A part of this is to accept payments in React Native apps, for which we use the React Native Checkout package, an open-source library, that has support for Apple Pay, Android Pay as well as regular credit card payments via Stripe.

One of the most important aspects of designing a mobile app consists of colors. We’re introducing a Color Framework – Chameleon, which can be used by mobile developers to create iOS apps. It provides support for amazing flat colors, color gradients, complementary colors, colors from images, hex codes, and many other features. The framework can be used in both Swift and Objective-C and it’s open-source on Github.