If you're looking to Download Data Jar on your Chromebook laptop Then read the following guideline.

Data Jar is a data store designed to be used with Shortcuts. The data store lets you persist key-value pairs. If you have used dictionaries and lists in Shortcuts, then you’ll find that the data format used by Data Jar is very similar. - Extensive support for Shortcuts, enabling you to read and update data directly from Shortcuts. - Store text, numbers, booleans, lists, dictionaries and even files. - Files are stored in iCloud Drive and can be accessed from the Files app. - Support for multiple windows and drag and drop on the iPad. - Synchronisation between devices using iCloud. Data Jar is free to use but contains a tip jar where users can pay a few bucks to support the developer.