Apps for writers tend to be less expensive than other kinds of software. Many sell for a one-time fee, although a few require a subscription. In addition to the cost of the desktop app, you should also factor in the fee for a service's mobile app, which is often sold separately. There are three types of writing apps in this story: Some writing apps include storage, but many don't. To make sure you never lose your work, you should back up your work early and often. A cloud storage service, such as Dropbox or iCloud, is often the most convenient solution. The good news is that pages of text don't take up much space, so you may be able to store a few works in your existing cloud storage account without paying for more space. Just keep in mind that you could eventually end up having to pay more for storage.