Every single person on the planet knows how good iOS and Android co-ordinate, in terms of data transfer between the two. Pairing your iDevice with Android Device via Bluetooth can be a pain in the neck. So people go with the other obvious solutions: Email the files to themselves, upload it to cloud, Bump! it or some other methods I am unaware of. But these are very inefficient, time consuming and waste your limited data plan.
Fast File Transfer is the probably the best application I’ve ever come across for this purpose. The only thing bad about it is, that it’s available only in the Google Play Store. Thus, one can only send files from Android to iOS.
It works on principle of WiFi Tethering, It creates a WiFi HotSpot and allows you to connect other devices, including other Android devices and iDevices. When the Recipient Device is connected to its WiFi Network, the user can access the files on the Sending Android Device.
Note: It doesn’t require Internet.
Up to 20x speed of Bluetooth.
No need for a common WiFi connection.
The receiver does not have to have the app installed.
Send single or multiple files.
Displays QR codes for faster receiving.
Use NFC for pairing (in beta stage).
For Android to Android Transfer, there’s another app: SuperBeam, which works flawlessly. I don’t know why, but I prefer to use SuperBeam for A-A Data Transfer, though Fast File Transfer works fine.