Eyefi Cloud memberships are available for $4.99/month or $49.99/year. For more details, please see our website.
Migrating your content from Eye-Fi Premium to Eyefi Cloud is free.
Eye-Fi Premium annual subscription rates are the same as Eyefi Cloud annual membership rates: $49.99/year. When you purchase a Mobi Pro card you will automatically get a 1 year subscription at no cost.
Please see How Do I Migrate for more details.