What are some alternatives?
Thunkable - Powerful but easy to use, drag-and-drop mobile app builder.
Bubble - Don't hire engineers! Bubble let's you build an app entirely visually
10Duke SDK - A rapid application development kit for creating new online applications. Dramatically reduce development times from months to weeks.
AppSheet - AppSheet enables users to create mobile apps instantly for both OS and Android.
Lightwell - App creation platform for creatives.
AppsGeyser - Appsgeyser is the easiest to use DIY native mobile app creation platform.