With every start of the app a "merge conflict" is shown.

This can occur in two special cases while the iCloud is enabled:

1. You are using more than one device with an app from MeteoGroup installed. If you purchased the premium service for each app separately, the merge conflict error occurs when starting the app.
   
   
2. You have more than one app from MeteoGroup installed on one device, and for each app a separate premium subscription with a different expiry date.

To solve this issue, please delete the unused apps and do not use the apps on multiple devices.