Added in-app subscription support (Monthly & Yearly plans).

Please test the purchase flow and overall app stability before production release.

Fixed error causing Apple Watch app to not install.

Fixed sorting issue
Added companion Apple Watch app

- Added ability to export visited landmarks in numerical or date visited order
- Added More Information link to each landmark page
- Added ability to pan image when zoomed in

Improved image gallery

Added support for landscape mode
Added support for taking photos in landscape mode
Added support for dismissing keyboard in Notes section
Added automatic timestamp when landmarks are marked as Visited