IBExpert is described as 'professional Integrated Development Environment (IDE) for the development and administration of InterBase and Firebird databases' and is an app in the Development category. There are eight alternatives to IBExpert for a variety of platforms, including Mac, Windows, Linux, iPhone and iPad. The best alternative is DBeaver, which is both free and Open Source. Other great apps like IBExpert are SQuirreL SQL (Free, Open Source), RazorSQL (Paid), FlameRobin (Free, Open Source) and Firebird Maestro (Paid).
DBeaver - Universal Database Manager and SQL Client. DBeaver is free and open source (GPL) universal database tool for developers and database administrators. Usability is the main goal of this project, program UI is carefully designed and implemented.
Open Sqlite databases and explore the internal organisation of various objects such as schema, tables and indices. To understand how Sqlite3 data is organised, please see [Database file format](https://www.sqlite.org/fileformat.html) from Sqlite website.