What's the difference between the two recovery modes?

There are two recovery modes: Recover from iTunes Backup File and Recover from iOS Device.

Recover from iTunes Backup File:

If you have ever made the data backup of your device in iTunes, this program can recover the deleted files via iTunes backup file. There is no device restrictions and it can support iPhone 4，iPhone 3GS, iPad 1, iPod Touch 4, iPhone 4S, iPad 2, New iPad, iPod Touch 5, iPhone 5, iPad mini, iPad with Retina display.

Applicable scenarios:
1. The data deleted for a long time from device;
2. The data lost due to inaccessible iOS device;
3. The device lost, but has iTunes back files.

Recover from iOS Device:

If you don't backup your lost data, you can recover the lost data via recover from iOS device.

Applicable scenarios:
1. The data was deleted recently;
2. There is no backup file for the lost data;
3. Inaccessible iOS device.