Dropbox is the place for your photos, docs, videos, and other files. Files you keep in Dropbox are safely backed up and you can get to them from all your devices. It’s easy to send large files to anyone, even if they don’t have a Dropbox account.
- Access your files on any device, even if you’re offline
- Create and edit Microsoft Office files from your iPhone or iPad
- Share links to your largest files without using email attachments
Dropbox offer in-app purchases for Dropbox Pro, which includes 1 TB of storage and additional features. The amount will be charged to your iTunes account and will vary by plan and country. You’ll see the total price before completing payment.
Dropbox Pro subscriptions purchased in-app renew monthly or yearly depending on your plan. Plans are priced at $9.99USD monthly and $99.99USD yearly (pricing may vary in countries other than the U.S.). To avoid renewal, you must turn off auto-renew at least 24 hours before your subscription ends.You can turn off auto-renew at any time from your iTunes account settings. Dropbox also offers one-month trials for monthly subscriptions.
For more information : https://www.dropbox.com/