Recorder Plus can export recordings to other apps on your iPhone/iPad very easily.
Just tap “Export”->”Open In…”, then select other app in the shown menu. (Figure 1)
If Dropbox, Google Drive, OneDrive, Evernote have been installed on iPhone/iPad, then these apps’ icon will be in the shown menu.
Also you can find whatsapp, instagram in the shown menu if these app have been installed on your iPhone/iPad.
Figure 1