iAnnotate 4 is the current offering from Folia and available on the App Store. It was launched on May 3, 2016.
The previous offering, iAnnotate PDF (version 3 and below) was removed from public sale on June 28, 2017 and is no longer being updated or supported. Customers who purchased iAnnotate PDF are able to continue using this version, however, not all features and functionality will work. In particular, older versions of iAnnotate may use deprecated and discontinued APIs for connection to cloud storage services like Dropbox.
Here are two specific discontinuations that we are aware of:
Dropbox- Version 3 of iAnnotate uses a Dropbox configuration that was discontinued by Dropbox at the end of 2017.
OneDrive- Version3 uses an API that was discontinued by Microsoft on November 1, 2018.
We strongly encourage users to backup all files stored in v3. We also encourage all customers to migrate to iAnnotate 4. As always, our team is here and happy to assist with any questions or concerns.
The Folia Team