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 form Shortcuts. Store text, numbers, booleans, lists, dictionaries and even files. Files are stored in iCloud Drive and can be accessed from the Files app. Take backups of your data from the in-app settings. 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.