I was wanting to add a few form fields to an existing PDF, but it seemed like only way to do this was to purchase an PDF app with tons of other features for more than $100. However, I found this little app, and it does what I needed. You can only add a text field, check box, or radio. You can control the text size for fields. I don't see a way to change the tab order for form fields. Pretty basic, but worked for my limited needs for adding fields on a single PDF.

The app works the way I want. The price is right!Very easy to use if you look closely at options. When adding to the pdf file you have to move the selecdted item in place and resize text and length. You only save as pdf file with form fields or other options.

I'm only able to give it two stars because of all the issues I experienced, but if you just need to add a text field or two to a form you already have it might work for you.This app is rough. It has a nonstandard UI. You'll have to be willing to play with it to try to figure it out.Dragging the ends of forms to make them wider/narrower is unintuitive because there isn't any cursor support for that like you'd expect in a Mac app. But the fact that you can do it in a PDF is nice! And there are alignment guides for the fields you add which feel satisfying!But radio-buttons don't work. If you lay them out one-by-one they might feel like round checkboxes, but if you clone them into a cluster they are either all on or off.And there may be other issues, I didn't fully test it.