Ragic will keep a records' history for each time you edit and save this particular record, which is visible through each entry's information panel.
Clicking the i icon at the lower-right corner of the form page while browsing your entry will display the history details, such as the create date, user the entry was created by, entry manager, users that are notified, and locking status.
If you have access rights higher than survey user (such as viewer, bulletin user, or admin), you will be able to view the history details of records.
You can click on the added/modified records, to view details on additions and modifications.
If you are the admin of a sheet, you can view changes made on a certain field. You would need to right click on a field and select field history. After that, a window will display with the related information.