The latest version of this app has a "Save & Load" feature that allows you to save and load your data on the same device, or even across devices!
To use it, be sure that you've updated the app to the latest version available in your device's App Store on all devices and follow the steps below.
Save:
To save your data, open the in-game Settings menu on your original device. Scroll to find and select "Save & Load". Sign into either your Google Account or Apple ID to save your data.
Load:
When you need to load your data, either to the same device or to another device, follow the same steps as above. Make sure to sign into the same Google Account or Apple ID that the data is saved to.