rtSurvey was built with CAPI efficiency in mind. Our software includes many tools needed to conduct offline long-form surveys, such as:
Built-in camera
Built-in voice recorder
QR scanner to scan/decode QR codes or create QR codes in a form
Messaging feature to chat with team members in real-time
R server to run analytics completely offline
For further information, check out our Features page and our Technical Docs.