You can grab the latest update at https://apps.apple.com/us/app/bookfusion/id1141834096 .We just released an update with some of the most requested improvements.
BookFusion Android 2.12.1 – Dark Mode Support & Other Updates
Dark Mode
The highly requested dark mode is now fully implemented in our Android app. Dark mode is supported on all refreshed interfaces from signing up,
BookFusion iOS 1.21.3 – Refreshed Libraries UI/UX & Updates
Readers, employees and students can now more easily browse digital libraries and quickly borrow e-resources with the full libraries refresh and update that was recently released.
Android 2.11.2 – New Bookshelf!! 
We’ve completed another major update to our Android app for both Tablets and Phones that introduces the start of our new Bookshelf.