Thank you Paul.

The two JS solutions don't provide the same way to save files: the Online version saves your design on sweethome3d.com server, whereas the App stores applications save them in local files (IndexedDB or plain files) without the need of a connection to Internet and registration.

This takes some time to develop these solutions, but this was interesting to develop and the App stores sales bring some revenues which help me to spend more time on improving and maintaining Sweet Home 3D.

The project isn't on GitHub, but on SourceForge.