Web applications have nowadays superseded traditional PC applications. However there are cases when desktop applications are  still the first choice; for example accounting software, databases or CPU intensive apps (Es. Video/audio encoders, graphic processing).

Hi Tekno develops Windows applications using Microsoft NET Framework and the C# language and Office applications written in VBA (Visual Basic for Applications).

Smartphone apps are surpassing even web apps in importance. 

Hi Tekno develops native multiplatform apps for Apple and Android smartphones with or without web services integration  using Xamarin e  the C# language.