If you have set up the iCloud Drive on each device, as described above, then you will be sharing charts between all those devices, as long as you have signed on to the iCloud Drive with the identical Apple ID on each device.

However, it is important to note that the first device that select to switch onto the iCloud Drive determines which files will appear on the iCloud Drive on all your Astro Gold devices. After switching on the first device, when you then activate the iCloud Drive on a second device, you will lose access to any charts that had been locally saved on that second device and now only see the charts that were in the iCloud Drive on the first device.

So it is a good idea, before you activate the iCloud Drive on a second device, that you check the second device for any charts that only exist on that device. If you have such charts, and want to keep them, export those charts to the first device (for example, send them as an attachment to an email), and open them in Astro Gold. This will put those charts on the iCloud Drive, so you do not lose them.

Once you have the iCloud Drive activated on every iPhone, iPad or Mac computer that you have the Astro Gold app, any chart you create and save on any of these devices will be accessible by Astro Gold on all the other devices.