To sync and share charts between Astro Gold iOS and Astro Gold Windows you have the option of installing a free Windows Store app called “iCloud”, created by Apple. This allows your chart files to be synced across both platforms provided that you have 1) enabled the iCloud Drive option in the iOS app, and 2) enable “iCloud Drive” sharing Windows iCloud app. Then you can use the Astro Gold Windows Chart Open / Files button to browse to the iCloud Drive folder on your PC, and select and use any chart files that already exist on your iPhone/iPad.