I'm an Android user. (Google Pixel 2XL)Do you have an iPhone?
Looking forward to your report.
For anyone out there with an iPhone, I'd look to pick up a cheap Android tablet, and see how Field Navigator works. You'd probably need to set up your fields when you have wifi access. Check Swappa for reliable pricing. (I haven't tried this, proceed at your own risk/experience) You'd get a bigger screen than a phone too.