Apps similar to Radzen include Microsoft PowerApps. It's paid, but Auto Back Office is free. Other options are PHPmaker. In total there are three apps like Radzen for Windows, the web, Android, iPhone and self-hosting.
PowerApps lets you generate business apps automatically by simply specifying one of a variety of data sources, or you can create apps from scratch. You can then customize them, share and run them or run apps others have created and shared with you.
United States
PHPMaker is a powerful automation tool that can generate a full set of PHP quickly from MySQL, PostgreSQL, Microsoft Access and Microsoft SQL Server databases.
Hong Kong
It's like a simplified version of PHPMaker, but way faster to install and update (they promise 30 seconds to a fully working version since you unzip the file on your server).
