This might be a big ask…
The app currently displays the first arrival (usually P) and a time to the S arrival if it can’t be displayed on the screen. This works well for close quakes, however, for large distant ones, often the first arrival is a weak Pdiff which is marginal or undetectable.
This doesn’t mean that subsequent arrivals are not detectable.
Is it possible to add the functionality to step through the arrivals in the phone app?
Rather than complicate the usability of the app for new users, perhaps, if this is possible, make it a feature that’s turned on in settings?
For example, the M6.8 quake in Equador from my station, the first arrivals (Pdiff, etc) are very weak, but later arrivals are much stronger/clearer.