There’s always, IME, been differences between the app on various platforms. Sometimes it’s the technology on each that leads to a difference, sometimes it’s just timeframes of SW development.
TR will know the relevant user numbers on each platform.
I only ever use the iOS app on the iPad when I’m doing indoor workouts, for everything else I use the web interface via my desktop. My desktop is too old to run the version of OS required for the desktop app and I find smartphone apps a general pain (plus my phone currently has a cracked screen so it’s an extra pain to use)