iPhone
Most plate calculators assume an unlimited, perfect set. Real gyms have four 45s, a stray 12.5 kg bumper, and a bar measured in the other unit. Barbell Genie works from what is on your rack.
A 20 kg bar with 45 lb plates is normal in a CrossFit gym and awkward to do in your head. Enter both units, get one correct total, and read it in whichever unit you think in.
Ask for 205 lb and, if nothing lands on it, you get the closest load under and over, how far each one misses, and which plates would close the gap. Not a wrong answer presented confidently.
No account, no sign-in, no network. It works in a basement with no reception because it never needed a connection in the first place. Nothing about your training leaves the phone — and nothing can.
Questions or problems: support@blackdragonlab.com, or read the support page.