Fluid Surveys can do many things. And most are documented in their video tutorials. This is a quick list of capabilities that it is good to be aware of.
Fluid Surveys keeps recent versions (up to 50) of your survey, creating a new one each time you save. You can revert to an earlier one, or you can just view it, and copy the stuff you want back into your latest.
You can edit, move, copy, rename, renumber, copy to a different page, copy to a different survey. Edit the html if you want, either with the WYSISYG or as raw html. Questions can be manually numbered if you want, but this may cause problems if you move them around.
Shared Multiple Choice Answer Sets
You can use predefined sets of answers, modifying them (reordering, changing, or removing some of the options) if you wish. These modified answer sets become available to all questions in your survey. If you choose to enable other languages, then you can also make the similar changes for each supported language.
Branching, Skipping, Piping and Quotos
You can change which questions are presented to a user, based on their responses to previous questions. You can even loop through a series of questions, answering them again and again, for different items that the user had previously selected.
Piping enables the questions to include the names of items selected by the user in previous questions. Complex, but powerful.
Quotas enable you to quit the survey once a quota has been reached, e.g. 3 people say they are bringing dessert.
You can create, delete, edit, move, rename. Drag them to reorder them.
Styles and Messages
Although surveys default to a University of Saskatchewan theme, you are free to change it. This is done with the Survey Themer. You can change fonts, sizes, colours, logos, banners, backgrounds, etc. Choose a prepared theme, and then modify it if you want.
You can copy the CSS from an existing website and insert your survey into the middle of it.
You can modify the text for most of the standard responses, such as the "Thank You" page, the "Quota Reached".
You can modify the text displayed on buttons.
You can ensure that user is only able to enter valid responses to your questions. Simple things like number limits (e.g. "Please enter a number between 10 and 50") are addressed, but other typical field types are also possible. Things such as email addresses, phone numbers, postal codes (US and Canadian).
You can enable other languages for your survey. With a simple addition to the URL, you can send different language versions of your survey to different groups. Note that the end users can switch back and forth between available languages as they desire. If you have created your own set of answers to multiple choice questions, then you are able to create an different answer set for each enabled language.
Surveys publish to a URL based on the name of the survey. If you wish, you can customize this URL (within limits) to be shorter or simpler. Or a small survey can be embedded within a web page.
Polls are small surveys which can be standalone or embedded as well. Polls are often used to present users with a running total of responses to date.
There are a variety of ways to control access to published surveys:
email invite (one survey per invite code)
ip address (one survery per household)
Surveys can also be limited in other ways as well: