Signature Add-on - field is tiny on iPhone

[GroovesMcFly (Matthew Farr)]

We’re using the GF Signature Add-On, version 3.83. Works great on the desktop but not so great on the iPhone. Shows a tiny field (see photo). Tried adjusting the pixel width to 600px, but it didn’t change at all. Tried removing the width completely, but that didn’t change anything either.

Any help for this?

[GroovesMcFly (Matthew Farr)]

Update: we temporarily fixed the problem by reverting to version 3.5 of the Signature Add-On. It’s non-responsive but now fills the whole screen.

[chrishajer (Chris (Gravity Forms))]

If you try the later version, and test in the form preview from an iPhone, how does it look there?

Also, which version iPhone?