Unreliable, and loses data

WARNING - I just purchased this and have been trying it out, all well and good. Its easy to learn, flexible, and I was about to make this my go-to app, then ... disaster. Very critical notes were horribly corrupted, and Ive been unable to recover but a fraction of notes. I would not recommend purchase of this potentially useful app until the developers solve their problem of file corruption. Use it at your own risk ... I wont until major changes are made.

Geo-Carl about GoodNotes 4