Your Information is safe
Security of information
The information you input is protected: first, by your device’s security features; secondly by the password protection of the app; and thirdly, upon using the Synching function, by support available from Amazon S3 cloud services. If you lose your device, the Synching function, when purchased will enable use of the information on other devices upon which the app was installed. If you don’t purchase the Synching function, a back up option is available on a cloud.
Below is a link to information from Apple about its iCloud service
Another benefit of the information being stored on the device is that information can be retrieved from the App even when you do not have Wi-Fi service.