Under what wind speeds can this drone return home up to?

Up to 20 mph.

Seems like a great beginner drone. Does it have any interesting features like circle me or follow me?

Yes. Most of the drones has GPS circle me (orbit mode) and follow me function except the F17.

Do you know what is the maximum Micro SD card memory it can handle?

A 32gb

What is the Range?

Up to 800-1600 feet depending on the drones.

Can I use the drone app on any phone?

No not any, Required Operating Systems are iOS 8.0 or later / Android 4.4.4 or later Recommended Devices: 4.7" to 5.5" Smartphones

How long do I need to charge the drone battery? How much flying time?

Charging Time: Approximately 5 hours, and Maximum Flying Time: Approximately 15-18 minutes.

Can I put a SD card in the tablet?

All of the androids tablets come with an SD card slot unless you have an ipad. This is to add more space on your tablet.