The ability to capture a signature on a form is a required feature for delivery of services in many organizations. One of the many problems with taking photo, say on iOS, of a written signature is that the jpg of the signature is then kicking around for other misuses, and the signature is arguably, not signing anything.
I also notice that if I make an attachment field and open a form with a share link on iOS, I have access to web based resources like Google photos, but no access the photos local to the device.
I suggest creating a share link of some sort that can be used in the iOS and android AirTable app that would enable a native implementation of a form. This would better access to the standard data pickers for the respective OS and enable the expected access to things link, documents, photos, location, and the ability to securely capture a signature in the context of the visible data to which it is related.
I notice that the ability to use forms on iOS is currently not enabled. I hope this means that something like or better than the suggestions made above is in the works : )
This would be another key feature that would allow us to kill other solutions we are currently using, and vastly simplify our processes. So close, Airtable. Please implement this one.