What do you have in mind for the style and theme of the app?
Light, white based with our brand colors blue and grey. The product should be an evolution of the current software version and still be recognizable for customers.
The main screen provides an overview of the available features including quick access for common functions.
What to avoid
Avoid use of too much custom images as the program shouldn't get too large in megabytes. The design will be implemented with a HTML/CSS UI framework.
The app must be best displayed at a size of 1024x690px. It is not needed to scale smaller but it should nicely resize on higher screen resolutions (maximized window).