Fillable pdfs

The fields themselves are likely to work, but (almost all) scripts associated with them will not.

What exactly do you consider "fillable forms"?

An what do you mean by "work on mobiles"?

Concerning "fillable forms": Do you mean PDFs you can fill with the "fill and sign" tool of Adobe Acrobat? Or do you mean PDFs with an AcroForm form definition? Or even with a XFA form definition?

Concerning "work on mobiles": Do you mean whether you can fill-in the PDFs in a web browser on arbitrary mobiles? Or in the general Adobe Acrobat Reader App on an applicable mobile? Or in the special Adobe Fill & Sign App on Apple mobiles?

 Hi David!

I hope you are doing well, and thanks for reaching out.

Yes, fillable PDFs can work on mobile devices, but there are a few important considerations to ensure a smooth experience: 

Use Compatible PDF Viewers: Ensure that users open the fillable PDF with a PDF viewer that supports form filling, such as Adobe Acrobat Reader for mobile.

Optimize for Mobile: Design the form with mobile users in mind. Use larger fonts, single-column layouts, and avoid small or densely packed fields. See this article for more information: Create fillable PDF forms on Android step-by-step | Adobe Acrobat

Enable Some form functionalities rely on JavaScript, so ensure it is enabled in the PDF viewer. 

For more details, see these articles: https://helpx.adobe.com/in/acrobat/using/creating-distributing-pdf-forms.html

https://helpx.adobe.com/in/acrobat/using/fill-and-sign.html

I hope this helps.

Thanks,

Anand Sri.

[edited response]