You can upload Voice Memo recordings from an iPhone via one extra step:
- Create and select the recording in the Voice Memo app then hit the Share icon on the left (a box with an upwards arrow)
- On the options page, hit 'Add To iCloud Drive' to add it to your own Apple iCloud storage. (Any location is fine)
- In LessonMate hit 'Add New' in the new lesson page and select 'iCloud Drive' from the popup menu
- Locate the audio recording you just saved there and select it
That should allow you add any Voice Memo audio recordings directly to a lesson. It also works with most other files stored in iCloud Drive, and Dropbox & Google Drive if you also have those connected to your iPhone.