If you have a recent phone, websites and PWAs are about as fast as native apps. I’m using a 2014 flagship Sony Xperia Z that came out with Android 4.4 and can barely run Android 13 — it will overheat and sytem UI (thankfully not apps) will restart if rendering stuff for too long. (The difference is staggering: basic old apps like Phyphox and static websites run indefinitely. Modern apps or JS-enabled pages like Voyager or 480p30 video for 10 minutes. Post-modern bloated crap or 720p30 video, 4 minutes. Imgur, new Reddit and 1080p video turn the phone into a hand warmer immediately and the framerate goes from 15 to <1 in 10 seconds, followed by a slew of ANRs and the battery percentage going down every 20th frame rendered. Should I have applied more heatsink compound after replacing the battery? Yes but I’d argue no app with a simple purpose and basic GUI should require 5 W to the CPU while running at half rate.)
Reveal which company it was, name and shame! Force them to publicly apologize! It’s not defamation if she can prove the discrimination in writing, and I’m not a lawyer but pretty sure legal precedent is in her favor.