What are some alternatives?
Briefs - Briefs is the essential app design tool built for a professional design workflow.
Survey Monkey - Create and publish online surveys in minutes, and view results graphically and in real time. SurveyMonkey provides free online questionnaire and survey software.
AppCooker - Design, mockup and prototype mobile applications with AppCooker. Discover the most powerful mockup engine ever created on the iPad. AppCooker and AppTaster deliver the full scope of the prototyping tools.
Typeform - Create beautiful, next-generation online forms with Typeform, the form & survey builder that makes asking questions easy & human on any device. Try it FREE!
Ionic Creator - Creator is a drag-&-drop prototyping tool for creating great apps using Ionic, with just a click of the mouse.
Google Forms - Simple web forms from Google.