Mobile development We have 7+ years of expertise in Android and Apple Environment (iOS, macOS, watchOS, tvOS) development. Last year, we also have formed a special team for a wearable device development, so we have an experience in cross-platform development. In our apps, we are using such technologies and frameworks like: Android stack of tech: Java, Kotlin, C++, Android SDK, NDK, JNI, JS, XML, JSON, SQL, RxAndroid/RxJava, OpenCV, SIP iOS stack of tech: Objective-C, Swift, RxSwift, CoreData, LocalAuthentification, CoreBluetooth, PushKit, VoIP, WatchKit