Best for developers building mobile apps who want to keep the code
FlutterFlow is the developer-adjacent option: a visual builder over Flutter that exports genuine source code. It removes the lock-in that defines this category, and expects more technical understanding than its rivals.
Best for client portals and internal tools built on existing data
Softr puts a polished, permission-controlled interface on data you already have. It is the fastest route from a spreadsheet to a working portal, and deliberately does not try to be an application platform.
Best for non-developers publishing a simple native mobile app
Adalo is the gentlest entry to mobile app building and the quickest to outgrow. It publishes genuine native apps from a simple editor, with performance and logic limits that appear early.