Your task list is a plain text file, not some proprietary format owned by a company or locked to a specific application.

A simple and timeless format Plain text is the simplest file format there is. It will always be accessible, by some kind of application, forever.

Plaintext files are tiny, simple, quick to work with, editable by tons of great programs, searchable by all modern operating systems, easy to back up, perfect for versioning, trivial to sync between devices, and are amazingly flexible in their uses and formats.

In this system, plaintext files are used for most of the backbone of your organizational system.

made to work alongside the various plain-text, Dropbox syncing mobile notes apps such as Denote for Android and Jottings for iPhone from an app for the Ubuntu desktop. Plain text notes anywhere you want. Easily synced between your desktop and phone. Notes, plain and simple.