Airtable is described as 'Highly customizable, user-friendly tool for creating relational databases that you can edit like a spreadsheet. Organize anything, with grids, forms, views, filters and grouping, calendars, Kanban, templates, collaboration, and integrations' and is a very popular team collaboration tool in the office & productivity category. There are more than 50 alternatives to Airtable for a variety of platforms, including Web-based, SaaS, Mac, Android and iPhone apps. The best Airtable alternative is Baserow, which is both free and Open Source. Other great apps like Airtable are NocoDB, Notion, Clappia and Grist.
Obvibase supports offline editing. It has a generous free plan and a single paid plan which is $3/user/month if billed yearly, $4/user/month if billed monthly.