What are some alternatives?
When comparing Appyet and appenguin, you can also consider the following products
Thunkable - Powerful but easy to use, drag-and-drop mobile app builder.
MIT App Inventor - MIT App Inventor | Explore MIT App Inventor
GoNative.io - Convert your existing web application into native Android and iOS
Codefreebnb - Airbnb clone. Written with not one line of code
AppsGeyser - Appsgeyser is the easiest to use DIY native mobile app creation platform.
Android Studio - Android development environment based on IntelliJ IDEA