Hi,
Here's what I thought of for your new logo. I've done #64 and #65 in a simple slick manner, which will also save up space and not detach the logo from the name. #61 and #62 displays a app icon with a stylized I&F combination and finally #66 and #67 displaying a simple yet catchy mobile app icon.
Your input is crucial.
Thank you,
Andrei