Is there a way to have a two-step process for fillable forms. For example one person comes in and fills a couple forms and saves those flat but there remains interactive elements for the next person to fill. I know you can go in and make forms read only after you've filled them but my client will be doing this on a tablet that does not have the "prepare form" editing tab.
Comment review and collaborate PDF, How to, PDF forms
You will need to create all the fields in advance and then hide some of them and use a script (for example, associated with a Signature field's Signed event) to make them visible, and the original ones read-only. You'll need to test whether that works on a mobile device, though. I'm not sure it will.