I'm looking for a GUI development tool with the following requirements: - Possibility to easily develop and modify a GUI with radio buttons, switches, text inputs etc., different GUI pages, menues etc. - Possibility to take over the GUI into an Android or iOS app. - There is no need for graphic effects, just text and controls. I didn't decide which IDE to take for the APP development. It will be quite a simple app, with these special features: Accessing a Bluetooth-LE device and saving a log file. Which GUI tool would you recommend and which (cross-development) IDE would you recommend for that? Thanks in advance!