Nfield provides a good variety of question types to make the whole experience for your mobile respondents more engaging.
You can use drag-and-drop, image maps, sum sliders, star-ratings, matrices and more. Mixing these up within a survey creates variety which keeps the respondent more attentive and focused, which will result in better data quality.
Nfield even takes care of matrix questions, which can be a real problem on mobile devices if not correctly resized. By automatically re-structuring these into a card presentation for mobile devices, Nfield makes matrix questions as easy as any other to answer. Readable, finger-tip friendly and fully aligned with the mobile first principle.