For successful syncing of data between your devices you need:
- More than 1 iOS device - e.g. an iPhone and an iPad
- The app installed on each device
- Each device logged into the same iCloud account - see the top of the Apple “Settings” screen for where this is located
- iCloud Drive is enabled on each device
- Point and Figure Charts has access to iCloud
- Each device to have Internet access
NOTE: you can choose to store data on a particular device locally and not on iCloud.
See this post to get a visual walkthrough of enabling these elements.