Thank you for your post.
If you format a Date field to display a Drop-down calendar, then the iOS date picker will display when the Date field is accessed in FileMaker Go.
If you format a Text field to display a Pop-up menu, then a choice picker will display when the Text field is accessed in FileMaker Go.
Currently, the different Keyboard Types cannot be controlled. I encourage you to enter this suggestion into our Feature Requests web form at:
The entries into this web form populate a database file hosted by our Development and Product Management departments where the entries are discussed and considered for future releases. Although I could easily copy your post and paste it into the web form, there are a couple of questions asked that only you can answer.