Hello
I offer to use Qt framework adventages - 1) QML technology allows to build quickly nice looking UI using Javascript and qml syntax, exists some ready nice looking components like charts etc 2) C++ gives ability to process quickly any data with higher perfomance and implement any functionality, protect data etc, 3) supports WebKit browser engine if you need to use any browser functionality or implement login to Facebook or Twitter account using API (in latest Qt version they begin to use chromium web engine), supports SQLite and other database drivers 4) any external C++ library can be integrated into your application if license will be ok to use this library in your app 5) crossplatform sources so the same sources will work on Windows, MAC, Linux, Android and iPhone.
You can look on QML video examples on YouTube.
I have very good experience in Qt/QML and I have 14 years experience in C++.
I'm available to work on your project 40 hours per week and I can start to work on your project this week.
I can answer here or in Skype to all your questions.
At what operating system your application should work?