WordPress plugin · Meta Box family
Meta Box Revision
Tracks, compares and restores Meta Box custom field changes through WordPress revisions.
About This Plugin
Meta Box Revision is an extension for the Meta Box plugin that tracks changes to custom fields in post revisions. WordPress tracks only the post title and content by default.
When the parent post is updated, the extension copies the custom field values to the new revision. The revision comparison screen shows the field changes below the title and content. Array values from cloneable or group fields appear as JSON, so you see both the structure and the data. Restoring a revision puts the custom field values back on the parent post.
It supports all field types, including groups. To turn it on, add 'revision' => true to the meta box configuration.