Once you install Everdo, it creates a local database for your data. That data never leaves your computer, which guarantees total privacy.
Because your personal productivity system is meant to be somewhat like an extension of your brain. We think it makes sense to avoid uploading such sensitive data to another party if possible.
When it comes to cloud-based apps, they typically store data on third-party servers in clear-text, unencrypted form. This is necessary in order to provide a seamless experience. Furthermore, some features like search are impossible to conduct on encrypted data. All this creates an additional unnecessary risk for the privacy of your data.
Everdo does not delete your actions and projects, except when you cleanup the Trash list yourself. This means you'll be able to look up anything you did at some point in the past.
SQLite is an open-source file-based database format. This makes your data always available and open to you, so you can do whatever you want with it:
You can learn about the database schema and location in the Everdo user manual.