Brendan from Finger-Ink here! We provide iPad forms for Cliniko that would do exactly what you want — except that, for now, they need to be filled out in clinic.
If you’re looking for something that does the online forms, as you describe, then check out Cliniq Apps.
Hope that helps!
p.s. we’re not affiliated with Cliniko, but our app does integrate with Cliniko to provide required functionality. If you’re interested in learning more check out https://finger-ink.com