Kodular
Kodular (formerly known as Makeroid) is another popular closed source spin-off of MIT App Inventor 2. At present, Kodular supports app development only for Android. However, MIT AI2 developers are working to add support for iOS as well. So, maybe in future Kodular will also support cross-platform app development. This was one of the reasons for changing its name from Makeroid to Kodular.
Kodular also comes with a Kodular Companion app like App Inventor but is more polished and well designed. Users can connect by scanning QR Code from Kodular Creator and test their apps in real time. Kodular comes with an attractive and clean user interface. It fully supports Android Material design. So designing Android apps with material themes is a breeze. One of the main features of Kodular is that it has lots of features. With every update, new features and components are added. With the availability of a large number of components, users can create complex and professional apps. With other features, it also provides the facility to add in-app purchases to apps.
Kodular is free and will forever be free to use, its website claims. However, if users implement AdMob Ads in their apps for monetization then Kodular will charge some commission. The commission may vary from 5% to 20% depending upon the complexity of the apps. Yet, users can use other ad components (like Facebook Ads, Chameleon Ad, Amazon Ads, In-App Billing etc.) and won’t be charged a penny.