This is how a section of my form looks on desktop:
On mobile:
Should I give the buttons full width on mobile instead? If so, why?
This is how a section of my form looks on desktop:
On mobile:
Should I give the buttons full width on mobile instead? If so, why?
Keep in mind you have to deal with a restricted "thumb length" on mobile phones. So making the buttons easy (easier) to reach from either the right or left border of the screen should be considered here.
I proposed a solution for a web app in this question. User-friendly way of displaying booleans in a custom field. Adding the mobile version for this could be the following; where you can use primary, secondary, and ghost versions of your buttons.
Try to disengage the Add Field from the Submit button since they perform different actions, and the user could fall into a misinterpretation of what each button does.