Base is a proprietary software, it costs £19.99 to buy. Although it has a free trial version which has multiple limitations, such as limiting developers to 15-minute long sessions and queries do not return more than 5 rows.
This tool was made to be used by both developers and end users. It was not made to be a shell for sqlite nor does it require to have knowledge of SQL. It's simply a visual tool to help users work with SQLite databases.