What evidence makes live mobile audio trustworthy in the field?

I own LiveTourAudio, and we are building it around a deceptively hard field problem: a guide speaks into one phone while guests listen through their own phones and earbuds as the group moves through real streets.

The no-install browser flow is the easy part to explain. The harder questions are what happens when an Android listener locks the screen, a device changes networks, the route passes through a weak coverage area, or a guest joins late. Low latency matters, but a stream that quietly stops is worse than one that is a little delayed.

Our testing has pushed us toward measuring the things a guide can actually feel during a paid tour:

- time from scanning the QR code to hearing the guide

- reconnect time after sleep or a network change

- listener continuity across a normal route

- battery and mobile-data use

- device and browser coverage

- the percentage of active listeners who are truly receiving audio

For people who have built mobile web audio, operated tours, or evaluated communications tools: what evidence would you want to see before trusting a browser-based audio system with a real group? A published device matrix, route-level test reports, reconnect percentiles, a live reliability dashboard, or something else?

I am Maria Olga Isaza, the owner of LiveTourAudio. We are scheduled to launch here on August 19, and I would rather publish the evidence working guides need than a polished but vague reliability claim.