Storyist 3 for iOS can store files in (sync with) both iCloud and Dropbox. Both work great, but there are some subtle differences between the services. Which one should you choose? Here is some information to help you make your decision.

iCloud

• Works better with large Storyist projects. Storyist projects are zip archives. When you edit a project, Storyist saves your changes and compresses the project files into an archive for you. Unlike Dropbox, iCloud is able to tell which elements of the zip archive have changed, and sync only the parts of the archive that have changed to the cloud. If your project contains lots of images, storing your project files in iCloud could save considerable network time and battery life.

• Easier Setup. If your iPad or iPhone is signed in to your iCloud account, you’re all set. There are no additional accounts to create or passwords to enter.

• Better sync conflict handling on Mac. Since iCloud is integrated into OS X, apps like Storyist 3 for Mac that support iCloud can automatically update to a new version from another device or handle a sync conflict as soon as it occurs.

There is something to be aware of, however.

• When you sign out of iCloud from the iCloud pane of the Settings app, files stored in your iCloud account are no longer available in Storyist. This may be what you want, or may scare the Dickens out of you. Note that when you sign out, your files are still safe in the cloud and will be available in Storyist when you sign back in to your iCloud account.

Dropbox

• Keeps old versions of your files for at least 30 days. This is a big deal. Dropbox keeps old versions of your files in the cloud, so you can revert a change even after it’s been synced with your other devices.

• Allows easier collaboration. If you have a cowriter or editor you can share folders and work together from a single folder.

• Ability to change sync folders. You can change which Dropbox folder you sync with simply by re-running Cloud Setup and choosing a different folder.