What are some alternatives?
When comparing Lianja App Builder and Fuse, you can also consider the following products
OpenXava - OpenXava is a Web Java Framework for Rapid Development of Enterprise Applications.
Siberian CMS - Siberian is an Open-Source and Free App Maker. Unlimited Push Notifications. Unlimited features. Fully Customizable. Download it and build your own app now!
Microsoft PowerApps - Microsoft PowerApps provides tools to create, customize, share and run apps.
Dropsource - Mobile development platform for building native iOS & Android apps
GoodBarber - GoodBarber is a mobile app creation platform.