Does Song Sleuth require an internet connection?
Song Sleuth does not make use of an internet connection except for sending recordings to other people over email or SMS. All processing is done on the iOS device itself, and recordings are not automatically shared with anyone, including Wildlife Acoustics.
If you back up the contents of your device to iCloud, you can opt to include Song Sleuth recordings. If you accidentally delete your recordings, they can be recovered by restoring the contents of your device from a backup.