Softr is a great tool, extremely easy to use and with a great customer service (way beyond the average Saas customer service).
Almost every week a major feature update appears. So, if there are missing key features now, be sure they will appear one quickly.
Concerning Softr mobile : you can make your web app a PWA with ... One click ! And that's it !
What sould be the second name of Softr ? "Easy"
Softr